I was originally going to to go the docker route but honestly just ended up going the binary route and leaving it using sqlite as it's good enough for now. It's pretty well documented and a chunk of the prereqs I already had, like the git user creation.

Did have SSH auth issues though, probably becauae I didn't fully cleanup after uninstalling gitlab (oops), had them in parallel for a bit to migrate the repos, gitlab had it trying to use gitlab-shell which didn't exist anymore. Probably a better/proper solution but what worked was changing the git user's home directory back to /home/git as gitlab had it using a gitlab config directory. I welcome anyone giving me a better/cleaner solution for this, on my to do list to do some more cleanup.