chore: Add SPDX header

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

docs/API-Nextcloud.md

@@ -1,3 +1,7 @@
+<!--
+  - SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 # Nextcloud APIs
 
 ## Capabilities

docs/API.md

@@ -1,4 +1,7 @@
-
+<!--
+  - SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 The REST API provides access for authenticated users to their data inside the Deck app. To get a better understanding of Decks data models and their relations, please have a look at the  [data structure](structure.md) documentation.
 
 # Prerequisites

docs/Markdown.md

@@ -1,3 +1,7 @@
+<!--
+  - SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 ## What is Markdown
 
 The [wikipedia markdown entry](https://en.wikipedia.org/wiki/Markdown) introduced markdown as :

docs/Release.md

@@ -1,3 +1,7 @@
+<!--
+  - SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 Releasing a new version works quite easy with [krankerl](https://github.com/ChristophWurst/krankerl) and [github-release](https://github.com/aktau/github-release) installed:
 
 1. Run krankerl to build the package

docs/User_documentation_en.md

@@ -1,4 +1,9 @@
+<!--
+  - SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 ## Introduction
+
 ### What about Deck ?
 You may know Kanban website like Trello? Deck is about the same thing but secured and respectful of your privacy!  
 Integrated in Nextcloud, you can easily manage your projects while having your data secured.

docs/export-import.md

@@ -1,3 +1,7 @@
+<!--
+  - SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 ## Export
 
 Deck currently supports exporting all boards a user owns in a single JSON file. The format is based on the database schema that deck uses. It can be used to re-import boards on the same or other instances.

docs/extra.css

@@ -1,3 +1,7 @@
+/**
+ * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
 .subnav ul {
 	padding-left: 20px;
 }

docs/implement-import.md

@@ -1,3 +1,7 @@
+<!--
+  - SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 ## Implement import
 
 * Create a new importer class extending `ABoardImportService`
@@ -29,4 +33,4 @@ $dispatcher->registerEventListener(
     YourCustomImporterListener::class
 );
 ```
-* Use the `lib/Service/Importer/Systems/TrelloJsonService.php` class as inspiration
+* Use the `lib/Service/Importer/Systems/TrelloJsonService.php` class as inspiration

docs/import-class-diagram.md

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+<!--
+  - SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 ## Import class diagram
 
 Importing boards to the Deck implements the class diagram below.

docs/index.md

@@ -1 +1,5 @@
+<!--
+  - SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 ../README.md

docs/resources/BoardImport.svg.license

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+SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/BoardImport.yuml

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+// SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
+// SPDX-License-Identifier: AGPL-3.0-or-later
 // Created using [yUML](https://github.com/jaime-olivares/vscode-yuml)
 
 // {type:class}

docs/resources/er-diagram.dia.license

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+SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/er-diagram.jpg.license

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+SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/gifs/EN_archive.gif.license

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+SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/gifs/EN_create_board.gif.license

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+SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/gifs/EN_create_columns.gif.license

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+SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/gifs/EN_create_task.gif.license

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+SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/gifs/EN_done.gif.license

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+SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/gifs/EN_put_infos.gif.license

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+SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/resources/gifs/EN_put_infos_2.gif.license

@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: AGPL-3.0-or-later

docs/structure.md

@@ -1,3 +1,7 @@
+<!--
+  - SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
 ## Database structure
 
 Deck stores most of its data inside of the database. The structure and relationships between entities is documented in the following ER diagram: