I have made a tool with which I can easily deploy and backup/restore dockerized web apps. Configuring and deploying gitea (or any other service I integrated so far) only takes a couple of minutes. Services are run behind an nginx reverse proxy container and Let’s Encrypt certificates are automatically issued if you choose so during config. The only requirement is docker.

I have been using it for about a year and recently put it on github, because I found it useful enough to share.

You an find it here https://github.com/chaosbunker/dockerbunker

Maybe not exactly what you are looking for, since I am not familiar with the discourse installer, but maybe interesting for someone? I’m happy about some feedback, since I never actively shared this until now.