Have you ever wondered why (or how) someone’s commit has a fancy “verified” badge on Github?
They have either created & committed from the Github web editor or signed their commit using a PKI key.
Git
Gitea describes itself as a painless self-hosted Git service. It has many of the same features as Git[hub/lab], but is much more lightweight.
This deployment runs in a Docker container on a Ubuntu 21.10 server. The whole deployment uses ~2% of one CPU core, and ~2GB of RAM. Easily runnable on a Raspberry Pi.