Debian, set and forget. Being a server you don’t need the latest version of any software and Debian is timely in security patches. use unattended-upgrades and forget about what is running your stuff.

There are many. The Idiot and Crime & Punishment both by Fedor Dostojevskij among the others.

I have a huge music collection on my NAS at home that I stream with Navidrome. It works even on a cheap VPS and it was quite easy to setup.