MPD doesn't really do streaming. If you install MPD on your server and then install an MPD client on your phone, the music will play on your server when you press play on your phone. You can re-encode the playback as an audio stream and stream that to your phone, but it's not really what MPD is built for.
Thanks for the correction; edited my comment to ensure nobody gets confused by my mistake. (I'm brand-new to using MPD, just installed it last week, so I had things backwards in my head).
MPD has built in HTTP streaming. I know at one point it didn't though.
https://mpd.readthedocs.io/en/latest/plugins.html#httpd
I note that they call it a plugin and also say the purpose of MPD isn't to stream.