how does Jellyfin run for you on the Pi? I’m assuming you’re pretty much the only one using it? if not how many streams can you transcode at once? how is the network overhead and disk usage when accessing Gitea, Immich, NextCloud, and Jellyfin all at once?
The Intel compute stick seems ideal for running Batocera or Lakka
other than that I’m not really sure how you’d use it as a server other than a learning experience. what all do you use the raspberry pi 4 to host? I know you can run a bunch of stuff on a pi, but I wouldn’t think about running my docker stack one even though I know you can. the same goes for the compute stick, you’re not going to want to run something heavy. does the does compute stick even function headless? that would be the first thing I’d check if you’re want to use it as some sort of server.
I’d recommend using Perforce over Git. Perforce in my opinion is easier to understand and use, as well as more widely used in the game industry.
The big difference between the two is centralized vs decentralized, Perforce being centralized and Git being decentralized. Plainly put P4 is one server with clients checking files in and out from it and tracking those changes, where Git is multiple servers merging their changes together.
In your use case here both are free to use. You should keep in mind that P4 wants to run on bare metal as you mentioned hosting this in your own server, so if you were thinking of spinning up something in proxmox or docker you may run into issues.
Whatever you use, making sure you have meaningful commit messages is the most important thing, especially if you’re going to be working with others. A brief idea of why a file was a changed six months ago is much more helpful than a commit message that says “…” or “updated”.