MusicIP runs very nicely serving up mixes of your local music, especially in conjunction with Logitech Media Server.
Although it's a very old program by now (and unfortunately closed source), I find it still makes mixes with a nice flavour, even better than Echonest in some respects (when that was easily available before Spotify made things difficult).
The server is available on port 10002. You can map directories
containing your music files as volumes so they are visible to the
server. See the example docker-compose.yml.
See extensive information and binaries kindly maintained at Spicefly.com, including documentation of the API.
To interface with Logitech Media Server I use an nginx wrapper which remaps some filenames and extensions, mainly for the historical reason that I ripped most of my CDs and bought iTunes music in m4a format before switching to Flac. Unfortunately the Linux version of MusicIP cannot read m4a files so I generated a shadow tree of lower bitrate mp3 files (also handy for devices).
See musicip.nginx for how to do this with nginx, which seems to
work, more or less. I find it a cleaner solution than the one which
is built into the Spicefly plugin, but YMMV.