fix: Add SPDX license headers to all files and remove files without license information

.editorconfig

@@ -1,4 +1,7 @@
 # https://editorconfig.org
+#
+# SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
 
 root = true
 

.github/dependabot.yml

@@ -2,6 +2,9 @@
 # package ecosystems to update and where the package manifests are located.
 # Please see the documentation for all configuration options:
 # https://docs.github.com/en/code-security/supply-chain-security/keeping-your-dependencies-updated-automatically/keeping-your-actions-up-to-date-with-dependabot
+#
+# SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: CC0-1.0
 
 version: 2
 updates:

.github/workflows/block-unconventional-commits.yml

@@ -2,6 +2,9 @@
 #
 # https://github.com/nextcloud/.github
 # https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+#
+# SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
 
 name: Block unconventional commits
 

.github/workflows/dispatch-workflow.yml

@@ -1,6 +1,10 @@
 # This workflow needs to be run on demand
 # It will search for all repositories containing the provided
 # action and open pull requests if necessary.
+# This workflow is provided via the organization template repository
+#
+# SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
 
 name: Update workflow from org template
 

.github/workflows/fixup.yml

@@ -2,6 +2,9 @@
 #
 # https://github.com/nextcloud/.github
 # https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+#
+# SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
 
 name: Block fixup and squash commits
 

.github/workflows/lint-yaml.yml

@@ -1,3 +1,11 @@
+# This workflow is provided via the organization template repository
+#
+# https://github.com/nextcloud/.github
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+#
+# SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
+
 name: Lint
 
 on: pull_request

.github/workflows/reuse.yml

@@ -0,0 +1,20 @@
+# This workflow is provided via the organization template repository
+#
+# https://github.com/nextcloud/.github
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+
+# SPDX-FileCopyrightText: 2022 Free Software Foundation Europe e.V. <https://fsfe.org>
+#
+# SPDX-License-Identifier: CC0-1.0
+
+name: REUSE Compliance Check
+
+on: [pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
+    - name: REUSE Compliance Check
+      uses: fsfe/reuse-action@a46482ca367aef4454a87620aa37c2be4b2f8106 # v3.0.0

.reuse/dep5

@@ -0,0 +1,12 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: Nextcloud's workflow templates
+Upstream-Contact: Nextcloud GmbH <https://nextcloud.com/impressum/>
+Source: https://github.com/nextcloud/.github
+
+Files: workflow-templates/*.properties.json
+Copyright: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+License: MIT
+
+Files: screenshots/*
+Copyright: 2022-2024 Nextcloud GmbH and Nextcloud contributors
+License: MIT

CONTRIBUTING.md

@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: MIT
+-->
+
 ## Submitting issues
 
 If you have questions about how to install or use Nextcloud, please direct these to our [forum][forum].