I'm looking for a docker container which can run a Java application. However, this should automatically pull updates from a GitHub repository. I had the following features in mind for a Workflow:

• Watching on a (private) GitHub repo for merges in main
• stopping active java app
• Fetching the GitHub repo
• building the Source Code (maven)
• updating DB structure if needed
• executing the new jar

Does something like this already exist or do I have to build it from scratch? I've been looking for a way to implement this workflow for my Java discord bot for so long and haven't found anything yet.

I would be very grateful for tips or similar.