I use Gitea for my own projects, i.e. I do the setup myself and it's trivial. It uses SQLite as backend, so no complex DB deployment.

It's very easy to deploy, consumes few resources (you can run it on a low-end VPS). It even has Jenkins integration.

However I don't know how it scales to big teams and projects since I only use it for myself. And I'm not entirely convinced by its security track record, but it looks like things are improving.