Install docker, grab the official docker compose file, then docker compose up -d.

Details: Look up how to install docker on elementary (I guess it’s sudo apt install docker), than you don’t have to care about the distro after that, docker works the same way everywhere. You can find countless tutorials on this, and they should work

Are you trying to install jellyfin server or client?

Elementary 8 circe is based on Ubuntu 24.04 LTS, which is based in debian 13, which has a codename “trixie”.