Gitea, i can't recommend it enough. Lightening fast compared to the proprietary offerings, clean simple UI like an older Github, and super simple to self host.

So long as you have an existing CI/CD story, or are willing to invest in head-to-heading them, to find one that fits your needs. Because both it and Forgejo's "we're deploying act, what could go wrong" give me the heebie-jeebies. And, aside from that, there are so many FLOSS ones they could have chosen that legitimately work making that decision extra opaque to me