Deploy images to GitHub container registry

[eaglesemanation]

Enhancement Type

Improve an existing feature

Describe the enhancement

Docker recently announced that they will sunset free team accounts in their container registry. While this does not affect your containers, I think it would be helpful to have a backup registry. There is an example of how this can be done: https://github.com/skills/publish-packages
I'm a bit busy now, but I may work on this on weekend and submit a PR for that

[itzg]

This seems to be a duplicate of #1444

[itzg]

Images now available on GHCR: https://github.com/itzg/docker-minecraft-server/pkgs/container/minecraft-server