Updating README

Signed-off-by: Nick Slowinski <nick@nick-slowinski.de>

README.md

@@ -1,3 +1,29 @@
-# Wichtige Information
+# Welcome to the source of www.nick-slowinski.de
 
-Diese Dokumentation wird momentan mit [Docusaurus](https://docusaurus.io) neugeschrieben und kann daher Lücken von wichtigen Informationen aufweisen.
+This website is build with [Docusaurus](docusaurus.io)
+
+When a branch _main_ is pushed to the repository, an [Action workflow](https://forge.nick-slowinski.de/nick-slowinski.de/www/actions) builds and deploys the new site under [www.nick-slowinski.de](https://www.nick-slowinski.de).
+
+## Contributing content
+
+Contributions in any form are gratefully accepted.
+
+### Adding, extending and changing content
+
+Fork; Commit changes; Push; Pull request.
+
+### Translating
+
+Multilingual functionality is currently planned, but not available.
+You can still support us by translating existing content.
+
+Steps:
+1. Fork this repository
+2. Duplicate the file in question and rename it like _"forge.{ISO 639-1 language code}.md"_
+    - e.g. for an English translation of that file: _forge.en.md_
+3. Push changes to your repository (fork).
+4. Create a pull request when you are satisfied with your results.
+
+# Licence
+
+Any content, unless otherwise specified, is published under the Creative Commons Attribution 4.0 International (CC BY 4.0) licence.