FYI it's a fork of gitea, and like gitea, only a single go binary. Super easy to upgrade. I have been running gitea first and now forgejo under docker. It's literally a 5 minute deal to install once you know how it works.
I did a bare metal to Docker container migration in about 30 minutes a couple of weeks ago. It’s not a very complicated setup, with few surprises, and this system admin appreciates that.