Docker Documentation

Hey,

I am using Docker I had some issues with starting up the Container due to the lack of documentation.
Hence this feature request for better documentation (e.g. Readme) how to start the Docker Container.
If wanted I can also help here. :slight_smile:
It would be best to place this Setup Guide here: Setup Guides - PhantomBot Community Forum

Edit: It should not be a guide how to install Docker but rather a guide how to setup the guide.