The really simple setup for a single user is just a SSH server with access to storage and the git command. Assuming your laptop and desktop have SSH access to server, you can just:
ssh server git init --bare somerepo
cd somerepo
git remote add server server:somerepo
git push --set-upstream somerepo master #(or main)
and then git clone server:somerepo.
For something slightly higher-tech, I recommend going with Forgejo (the fork of Gitea). It is really easy to set up and low maintainance.
Avoid GitLab for small setups, it is fairly resource hungry.
That was not scheduled maintainance, that was theit WaF and Workers dying. https://www.cloudflarestatus.com/incidents/lfrm31y6sw9q https://www.cloudflarestatus.com/incidents/k9ppxftx8bs5