diff --git a/.gitignore b/.gitignore
index 5c919d3..fb8ab18 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
+# SPDX-License-Identifier: Apache-2.0
+
 /target
 tmp
diff --git a/Cargo.lock b/Cargo.lock
index a005cd3..abd2e50 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 version = 4
diff --git a/Cargo.toml b/Cargo.toml
index c1e2546..757ae85 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 [package]
 name = "detee-cli"
 version = "0.1.0"
diff --git a/LICENSE b/LICENSE
index 9efa6fb..d645695 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,338 +1,202 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- <https://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
 
-                            Preamble
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it.  (Some other Free Software Foundation software is covered by
-the GNU Lesser General Public License instead.)  You can apply it to
-your programs, too.
+   1. Definitions.
 
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
 
-  To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
 
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have.  You must make sure that they, too, receive or can get the
-source code.  And you must show them these terms so they know their
-rights.
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
 
-  We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
 
-  Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software.  If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
-that any problems introduced by others will not reflect on the original
-authors' reputations.
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
 
-  Finally, any free program is threatened constantly by software
-patents.  We wish to avoid the danger that redistributors of a free
-program will individually obtain patent licenses, in effect making the
-program proprietary.  To prevent this, we have made it clear that any
-patent must be licensed for everyone's free use or not licensed at all.
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
 
-  The precise terms and conditions for copying, distribution and
-modification follow.
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
 
-                    GNU GENERAL PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
 
-  0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License.  The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language.  (Hereinafter, translation is included without limitation in
-the term "modification".)  Each licensee is addressed as "you".
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
 
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope.  The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
 
-  1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
-conspicuously and appropriately publish on each copy an appropriate
-copyright notice and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
 
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
 
-  2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
 
-    a) You must cause the modified files to carry prominent notices
-    stating that you changed the files and the date of any change.
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
 
-    b) You must cause any work that you distribute or publish, that in
-    whole or in part contains or is derived from the Program or any
-    part thereof, to be licensed as a whole at no charge to all third
-    parties under the terms of this License.
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
 
-    c) If the modified program normally reads commands interactively
-    when run, you must cause it, when started running for such
-    interactive use in the most ordinary way, to print or display an
-    announcement including an appropriate copyright notice and a
-    notice that there is no warranty (or else, saying that you provide
-    a warranty) and that users may redistribute the program under
-    these conditions, and telling the user how to view a copy of this
-    License.  (Exception: if the Program itself is interactive but
-    does not normally print such an announcement, your work based on
-    the Program is not required to print an announcement.)
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
 
-These requirements apply to the modified work as a whole.  If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works.  But when you
-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
 
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Program.
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
 
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
-the scope of this License.
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
 
-  3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
 
-    a) Accompany it with the complete corresponding machine-readable
-    source code, which must be distributed under the terms of Sections
-    1 and 2 above on a medium customarily used for software interchange; or,
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
 
-    b) Accompany it with a written offer, valid for at least three
-    years, to give any third party, for a charge no more than your
-    cost of physically performing source distribution, a complete
-    machine-readable copy of the corresponding source code, to be
-    distributed under the terms of Sections 1 and 2 above on a medium
-    customarily used for software interchange; or,
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
 
-    c) Accompany it with the information you received as to the offer
-    to distribute corresponding source code.  (This alternative is
-    allowed only for noncommercial distribution and only if you
-    received the program in object code or executable form with such
-    an offer, in accord with Subsection b above.)
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
 
-The source code for a work means the preferred form of the work for
-making modifications to it.  For an executable work, complete source
-code means all the source code for all modules it contains, plus any
-associated interface definition files, plus the scripts used to
-control compilation and installation of the executable.  However, as a
-special exception, the source code distributed need not include
-anything that is normally distributed (in either source or binary
-form) with the major components (compiler, kernel, and so on) of the
-operating system on which the executable runs, unless that component
-itself accompanies the executable.
+   END OF TERMS AND CONDITIONS
 
-If distribution of executable or object code is made by offering
-access to copy from a designated place, then offering equivalent
-access to copy the source code from the same place counts as
-distribution of the source code, even though third parties are not
-compelled to copy the source along with the object code.
+   APPENDIX: How to apply the Apache License to your work.
 
-  4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License.  Any attempt
-otherwise to copy, modify, sublicense or distribute the Program is
-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
-this License will not have their licenses terminated so long as such
-parties remain in full compliance.
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
 
-  5. You are not required to accept this License, since you have not
-signed it.  However, nothing else grants you permission to modify or
-distribute the Program or its derivative works.  These actions are
-prohibited by law if you do not accept this License.  Therefore, by
-modifying or distributing the Program (or any work based on the
-Program), you indicate your acceptance of this License to do so, and
-all its terms and conditions for copying, distributing or modifying
-the Program or works based on it.
+   Copyright [yyyy] [name of copyright owner]
 
-  6. Each time you redistribute the Program (or any work based on the
-Program), the recipient automatically receives a license from the
-original licensor to copy, distribute or modify the Program subject to
-these terms and conditions.  You may not impose any further
-restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties to
-this License.
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
 
-  7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot
-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all.  For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
+       http://www.apache.org/licenses/LICENSE-2.0
 
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
-apply and the section as a whole is intended to apply in other
-circumstances.
-
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices.  Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
-
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-
-  8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded.  In such case, this License incorporates
-the limitation as if written in the body of this License.
-
-  9. The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-Each version is given a distinguishing version number.  If the Program
-specifies a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation.  If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
-
-  10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
-to ask for permission.  For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this.  Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
-
-                            NO WARRANTY
-
-  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
-
-  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGES.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License along
-    with this program; if not, see <https://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
-
-    Gnomovision version 69, Copyright (C) year name of author
-    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary.  Here is a sample; alter the names:
-
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-  <signature of Moe Ghoul>, 1 April 1989
-  Moe Ghoul, President of Vice
-
-This General Public License does not permit incorporating your program into
-proprietary programs.  If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/README.md b/README.md
index f119942..91eb4d2 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-License-Identifier: Apache-2.0
+-->
+
 # DeTEE CLI
 
 The DeTEE CLI will allow you to create VMs and containers on the [DeTEE decentralized cloud network](https://detee.ltd/).
diff --git a/build.rs b/build.rs
index 429f0a7..551102e 100644
--- a/build.rs
+++ b/build.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use shadow_rs::ShadowBuilder;
 
 fn main() {
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 240b1cc..81bbda6 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 from archlinux:latest
 copy tmp/.detee /root/.detee
 run pacman -Syu --noconfirm
diff --git a/docker/create_image.sh b/docker/create_image.sh
index 65f5bda..0a13e06 100755
--- a/docker/create_image.sh
+++ b/docker/create_image.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+
+# SPDX-License-Identifier: Apache-2.0
+
 cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
 scriptdir="$(pwd)"
 mkdir "${scriptdir}/tmp"
diff --git a/rustfmt.toml b/rustfmt.toml
index a484977..4d32ee1 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 reorder_impl_items = true
 use_small_heuristics = "Max"
 imports_granularity = "Crate"
diff --git a/samples/dtrfs/sample.yaml b/samples/dtrfs/sample.yaml
index 3fb3e12..539660a 100644
--- a/samples/dtrfs/sample.yaml
+++ b/samples/dtrfs/sample.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 dtrfs_url: http://registry.detee.ltd/dtrfs-payments2025-01-23.cpio.gz
 dtrfs_sha: 2e95d7969a0f2ae2ee6f37acd2789a032be1653e76ba93e607477c8b1cde42ed
 kernel_url: http://registry.detee.ltd/vmlinuz-linux-6.12.10-arch1-1
diff --git a/samples/new_app/new_app_deploy_config.yaml b/samples/new_app/new_app_deploy_config.yaml
index 906c156..46b8d2b 100644
--- a/samples/new_app/new_app_deploy_config.yaml
+++ b/samples/new_app/new_app_deploy_config.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 node_pubkey: 3mWjE6FnKQ8f9WRjGHdj1Jtyewsri87GXQpqLWpwtjhr
 package_url: https://registry.detee.ltd/sgx/packages/actix-app-info_package_2025-03-19_13-49-56.tar.gz
 private_package: false
diff --git a/samples/new_app/new_app_launch_config.yaml b/samples/new_app/new_app_launch_config.yaml
index 4641a86..3df3d92 100644
--- a/samples/new_app/new_app_launch_config.yaml
+++ b/samples/new_app/new_app_launch_config.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 environments:
   - name: APP_NAME
     value: actix-test
diff --git a/samples/new_vm/advanced_os_config.yaml b/samples/new_vm/advanced_os_config.yaml
index 2fc466a..39ce689 100644
--- a/samples/new_vm/advanced_os_config.yaml
+++ b/samples/new_vm/advanced_os_config.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 hostname: my-specific-vm-01
 price: 20000
 hours: 5
diff --git a/samples/new_vm/no_public_ips.yaml b/samples/new_vm/no_public_ips.yaml
index d4660f1..a83c7da 100644
--- a/samples/new_vm/no_public_ips.yaml
+++ b/samples/new_vm/no_public_ips.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 hostname: my-vm-01
 hours: 5
 price: 20000
diff --git a/samples/new_vm/public_ipv4_and_ipv6.yaml b/samples/new_vm/public_ipv4_and_ipv6.yaml
index c86cb0c..d6af1a6 100644
--- a/samples/new_vm/public_ipv4_and_ipv6.yaml
+++ b/samples/new_vm/public_ipv4_and_ipv6.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 hostname: my-public-vm-01
 hours: 5
 price: 20000
diff --git a/samples/new_vm/specific_city.yaml b/samples/new_vm/specific_city.yaml
index f102365..8871e1b 100644
--- a/samples/new_vm/specific_city.yaml
+++ b/samples/new_vm/specific_city.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 hostname: my-bucharest-vm-01
 hours: 5
 price: 20000
diff --git a/scripts/detee-cli_injector.sh b/scripts/detee-cli_injector.sh
index 87866a1..146eb5f 100755
--- a/scripts/detee-cli_injector.sh
+++ b/scripts/detee-cli_injector.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+
+# SPDX-License-Identifier: Apache-2.0
+
 set -e
 cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
 
diff --git a/scripts/install.sh b/scripts/install.sh
index 1ead112..ab84d86 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+
+# SPDX-License-Identifier: Apache-2.0
+
 cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
 scriptdir="$(pwd)"
 
diff --git a/src/bin/detee-cli.rs b/src/bin/detee-cli.rs
index d331a23..484aedd 100644
--- a/src/bin/detee-cli.rs
+++ b/src/bin/detee-cli.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use clap::{builder::PossibleValue, Arg, Command};
 use detee_cli::general::cli_handler::{
     handle_account, handle_completion, handle_operators, handle_packagers,
diff --git a/src/bin/super-detee-cli.rs b/src/bin/super-detee-cli.rs
index ec04b3d..f0e9c18 100644
--- a/src/bin/super-detee-cli.rs
+++ b/src/bin/super-detee-cli.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use clap::{Arg, ArgMatches, Command};
 use clap_complete::{generate, Shell};
 use detee_cli::config::Config;
diff --git a/src/config.rs b/src/config.rs
index 78a52a0..ab08576 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::constants::{BRAIN_STAGING, BRAIN_TESTING};
 use crate::{general, utils::block_on};
 use ed25519_dalek::SigningKey;
diff --git a/src/constants.rs b/src/constants.rs
index f28deeb..4ae3f61 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use rand::Rng;
 use std::sync::LazyLock;
 
diff --git a/src/general/cli_handler.rs b/src/general/cli_handler.rs
index 9356d87..02dc1fe 100644
--- a/src/general/cli_handler.rs
+++ b/src/general/cli_handler.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use super::operators;
 use super::packagers;
 use crate::{cli_print, config};
diff --git a/src/general/grpc.rs b/src/general/grpc.rs
index 014fa50..540db7b 100644
--- a/src/general/grpc.rs
+++ b/src/general/grpc.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::config::Config;
 use crate::snp::grpc::proto::VmContract;
 use crate::utils::sign_request;
diff --git a/src/general/mod.rs b/src/general/mod.rs
index 50abfc6..27277f4 100644
--- a/src/general/mod.rs
+++ b/src/general/mod.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 pub mod cli_handler;
 pub mod grpc;
 pub mod operators;
diff --git a/src/general/operators.rs b/src/general/operators.rs
index ab9304f..39c4194 100644
--- a/src/general/operators.rs
+++ b/src/general/operators.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::general::grpc;
 use crate::utils::block_on;
 use tabled::Tabled;
diff --git a/src/general/packagers.rs b/src/general/packagers.rs
index 77c964c..b8052da 100644
--- a/src/general/packagers.rs
+++ b/src/general/packagers.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use serde::Serialize;
 use tabled::Tabled;
 
diff --git a/src/lib.rs b/src/lib.rs
index 8fb6570..373d517 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 pub mod config;
 pub mod constants;
 pub mod general;
diff --git a/src/name_generator.rs b/src/name_generator.rs
index 905a3d0..b8b7378 100644
--- a/src/name_generator.rs
+++ b/src/name_generator.rs
@@ -1,4 +1,7 @@
 #![allow(dead_code)]
+
+// SPDX-License-Identifier: Apache-2.0
+
 use rand::Rng;
 
 pub fn random_app_name() -> String {
diff --git a/src/sgx/cli_handler.rs b/src/sgx/cli_handler.rs
index 05e0308..347c39c 100644
--- a/src/sgx/cli_handler.rs
+++ b/src/sgx/cli_handler.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::config::Config;
 use crate::name_generator::random_app_name;
 use crate::sgx::config::{validate_yaml, DeteeCliExt};
diff --git a/src/sgx/config.rs b/src/sgx/config.rs
index 02e3105..0dcb250 100644
--- a/src/sgx/config.rs
+++ b/src/sgx/config.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use detee_shared::sgx::types::{brain::AppDeployConfig, dtpm::DtpmConfig};
 
 #[derive(thiserror::Error, Debug)]
diff --git a/src/sgx/grpc_brain.rs b/src/sgx/grpc_brain.rs
index 67fedc6..c507980 100644
--- a/src/sgx/grpc_brain.rs
+++ b/src/sgx/grpc_brain.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use detee_shared::app_proto::brain_app_cli_client::BrainAppCliClient;
 use detee_shared::app_proto::{
     AppContract, AppNodeFilters, AppNodeListResp, DelAppReq, ListAppContractsReq, NewAppReq,
diff --git a/src/sgx/grpc_dtpm.rs b/src/sgx/grpc_dtpm.rs
index 8891e2a..88b8ae1 100644
--- a/src/sgx/grpc_dtpm.rs
+++ b/src/sgx/grpc_dtpm.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use detee_sgx::{prelude::*, HRaTlsConfigBuilder};
 use detee_shared::{
     common_proto::Empty,
diff --git a/src/sgx/mod.rs b/src/sgx/mod.rs
index a313a8c..6c1ea0c 100644
--- a/src/sgx/mod.rs
+++ b/src/sgx/mod.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 pub mod cli_handler;
 pub mod config;
 pub mod grpc_brain;
diff --git a/src/sgx/packaging.rs b/src/sgx/packaging.rs
index ae065e3..97b0eb3 100644
--- a/src/sgx/packaging.rs
+++ b/src/sgx/packaging.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::config::Config;
 use std::process::Command;
 
diff --git a/src/sgx/utils.rs b/src/sgx/utils.rs
index 9bddc11..a65b37d 100644
--- a/src/sgx/utils.rs
+++ b/src/sgx/utils.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::constants::HRATLS_APP_PORT;
 use crate::sgx::get_one_contract;
 use crate::sgx::grpc_brain::new_app;
diff --git a/src/snp/cli_handler.rs b/src/snp/cli_handler.rs
index 05de386..db206ea 100644
--- a/src/snp/cli_handler.rs
+++ b/src/snp/cli_handler.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::general;
 use crate::name_generator;
 use crate::snp;
diff --git a/src/snp/deploy.rs b/src/snp/deploy.rs
index bfa0534..8d11d29 100644
--- a/src/snp/deploy.rs
+++ b/src/snp/deploy.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use super::{
     grpc::{self, proto},
     injector, Distro, Dtrfs, Error, VmSshArgs, DEFAULT_ARCHLINUX, DEFAULT_DTRFS,
diff --git a/src/snp/grpc.rs b/src/snp/grpc.rs
index 34b1cba..45f0549 100644
--- a/src/snp/grpc.rs
+++ b/src/snp/grpc.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 pub mod proto {
     pub use detee_shared::general_proto::*;
     pub use detee_shared::vm_proto::*;
diff --git a/src/snp/injector.rs b/src/snp/injector.rs
index 4b80c49..4edc22a 100644
--- a/src/snp/injector.rs
+++ b/src/snp/injector.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::{config::Config, snp::grpc::proto};
 use log::debug;
 use std::net::IpAddr;
diff --git a/src/snp/mod.rs b/src/snp/mod.rs
index 9d5ee78..3de89ba 100644
--- a/src/snp/mod.rs
+++ b/src/snp/mod.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 pub mod cli_handler;
 pub mod deploy;
 pub mod grpc;
diff --git a/src/snp/update.rs b/src/snp/update.rs
index d471963..3a68e82 100644
--- a/src/snp/update.rs
+++ b/src/snp/update.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use super::{
     grpc::{self, proto},
     injector, Dtrfs, Error,
diff --git a/src/utils.rs b/src/utils.rs
index b728962..9b32a71 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::config::Config;
 use tonic::{
     metadata::{errors::InvalidMetadataValue, AsciiMetadataValue},