Include binaries for radio streams

[wallzero]

Could some binaries be included to also stream internet radio? Here is an example in the snapcast docs.

[W-Floyd]

Container size increases dramatically, adding mpv pulls in tons of other dependencies and my image balloons from 55MB to 524MB. Possible that a separate tag could be made that includes mpv. Alternatively, if ffmpeg can be made to work, that results in an image size of 170MB.