Koel: A personal music streaming server
I also built something similar, however instead of ripping of Spotify UI, which I personally find terrible, I made a "power user" UI that is album-centric (they way I listen to music), keyboard navigable and has a powerful filtering "omnibar".
Check it out at: <a href="https://github.com/knoopx/headbang" rel="nofollow">https://github.com/knoopx/headbang</a>