chore: Add SPDX header

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

.reuse/dep5

@@ -3,7 +3,7 @@ Upstream-Name: recommendations
 Upstream-Contact: Nextcloud <info@nextcloud.com>
 Source: https://github.com/nextcloud/recommendations
 
-Files: .gitattributes .github/* .editorconfig babel.config.js .php-cs-fixer.dist.php package-lock.json package.json composer.json composer.lock README.md img/app.svg webpack.js stylelint.config.js .eslintrc.js .gitignore .jshintrc .l10nignore action/.gitignore action/package.json action/package-lock.json action/dist/index.js tests/* psalm.xml  cypress/.env cypress/.eslintrc.js cypress/docker-compose.yml cypress/plugins/index.js cypress/tsconfig.json cypress.config.ts vendor-bin/*/composer.json stylelint.config.cjs vendor-bin/*/composer.lock .tx/config webpack.config.js tsconfig.json vite.config.ts js/vendor.LICENSE.txt src/__mocks__/@nextcloud/activity_ws.json krankerl.toml
+Files: .gitattributes .github/* .editorconfig babel.config.js .php-cs-fixer.dist.php package-lock.json package.json composer.json composer.lock img/app.svg webpack.js stylelint.config.js .eslintrc.js .gitignore .jshintrc .l10nignore action/.gitignore action/package.json action/package-lock.json action/dist/index.js tests/* psalm.xml  cypress/.env cypress/.eslintrc.js cypress/docker-compose.yml cypress/plugins/index.js cypress/tsconfig.json cypress.config.ts vendor-bin/*/composer.json stylelint.config.cjs vendor-bin/*/composer.lock .tx/config webpack.config.js tsconfig.json vite.config.ts js/vendor.LICENSE.txt src/__mocks__/@nextcloud/activity_ws.json krankerl.toml
 Copyright: none
 License: CC0-1.0
 

README.md

@@ -1,3 +1,7 @@
+<!--
+  - SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: CC0-1.0
+-->
 # 🔮 Nextcloud Recommendations
 
 [![REUSE status](https://api.reuse.software/badge/github.com/nextcloud/recommendations)](https://api.reuse.software/info/github.com/nextcloud/recommendations)