I have no idea what a thin client is?
I skipped over your git and I got confused so it’s probably over my head lol…
I was think about trying jellyfin on it?
Depends on what you want to achieve. For corporate use it would make a fantastic thinclient (I have https://github.com/henk717/uftc )
Could make it a media center, could make it a light weight server, could make it an emulation station PC. PC for light office work, etc.
I got something similar but with more ram for free at work and its a home theater pc now.
Discussion
Jellyfin might work. I haven't used it. You could also make it a NAS, or a home-network-level ad blocker/firewall.