If your goal is to just store your repos, even Gogs will do. I self-host Forgejo on sqlite and it‘s been great thusfar. I do not yet use runners, so can‘t say much about that. The Docker registry they offer is a bit awkward to use but better than nothing. My instance is only intranet visible, so I only push to http:// remotes. I have my repos docker volume backed up automatically, so I feel like I got a pretty solid setup right now.