Sonerezh Rock-on request (LibreSpotify)

I’d like to add an open source “Spotify-like” service to my rockstor NAS and found the Sonerezh Project (AGPLv3)
https://www.sonerezh.bzh/

They do provide a docker image and I’m just asking: is anyone here willing to look into this and help making it a working rock-on?
https://hub.docker.com/r/sonerezh/sonerezh/

Best regards

EDIT: added docker.com link