Merge pull request #4086 from luixxiul/fix

Update docs: add copyright headers to docs linking to installing.md

docs/just.md

@@ -1,3 +1,10 @@
+<!--
+SPDX-FileCopyrightText: 2023 - 2024 Slavi Pantaleev
+SPDX-FileCopyrightText: 2024 - 2025 Suguru Hirahara
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 # Running `just` commands
 
 We have previously used [make](https://www.gnu.org/software/make/) for easily running some playbook commands (e.g. `make roles` which triggers [`ansible-galaxy`](https://docs.ansible.com/ansible/latest/cli/ansible-galaxy.html)). Our [`Makefile`](../Makefile) is still around, and you can still run these commands.

docs/playbook-tags.md

@@ -1,3 +1,10 @@
+<!--
+SPDX-FileCopyrightText: 2018 - 2022 Slavi Pantaleev
+SPDX-FileCopyrightText: 2024 - 2025 Suguru Hirahara
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 # Playbook tags
 
 The Ansible playbook's tasks are tagged, so that certain parts of the Ansible playbook can be run without running all other tasks.