Looked at Gitea as a self-hosted alternative for GitHub. It looks nice: a lot of useful features like global code search and template repositories. There is a comprehensive comparison of Gitea to other Git hosting solutions. It can help decide if Gitea is suited for your needs or not.
The only thing that surprised me a bit: the information about package registry is already in the official docs, but PR with this feature was merged only several days ago, so it will be available only in v1.17.0. The most recent release for now is v1.16.5.