Big +1 for Forgejo, also they are actively working on implementing Federation, i.e. in the future Forgejo servers will be able to exchange information as a federated network, just like good old Lemmy 😊 If you want to try the toolchain (Forgejo+Woodpecker CI), it's what Codeberg.org (run by the German nonprofit organization of the same name) offers freely.

The actions are amazing, and I was also able to integrate them with tailscale so I can build and deploy everything within my network automatically.
I run it in a vps with 1cpu and 2gb ram along several other services.