docs: Adjust the documentation

Author: ZPascal

README.md

@@ -1,2 +1,18 @@
-# pretix-docker-compose
-The repository includes a Pretix Docker compose configuration.
+# Pretix Docker-Compose setup
+The repository includes a [Pretix](https://pretix.eu/about/de/) docker-compose configuration for local development.
+
+## Usage
+
+You can execute `docker-compose up -d` to start all related containers.
+
+## Contribution
+If you would like to contribute something, have an improvement request, or want to make a change inside the code, please open a pull request.
+
+## Support
+If you need support, or you encounter a bug, please don't hesitate to open an issue.
+
+## Donations
+If you would like to support my work, I ask you to take an unusual action inside the open source community. Donate the money to a non-profit organization like Doctors Without Borders or the Children's Cancer Aid. I will continue to build tools because I like it, and it is my passion to develop and share applications.
+
+## License
+This product is available under the Apache 2.0 license.