I dabbled with a number of music streaming servers, including Ampache and Subsonic (and it's many forks), and had trouble with either web interface loading times or app connectivity and couldn't find one that worked 'as advertised'. In one of these similar music streaming discussion threads, HN member epoupon mentioned the system they'd authored: LMS[0] (Lightweight Music Server), which I found ticked all the boxes and was quick and easy to setup - and there's also a docker image[1].
Not affiliated in any way, just a satisfied user.
Navidrome [2] is another relatively new option for music streaming servers. Lightweight, written in Go, can handle very large music collections, and is compatible with Subsonic/Madsonic/Airsonic.