[METRONOME] websocket is broken


on my yunohost installation (3.4), WebSocket module won’t start due to a bad Lua or LuaJit version; it wants 5.2 where we have 5.1.

Also, I did not find where in Nginx the WebSocket stuff for metronome has been configured (but that’s another story).

If that’s new stuff then maybe it’s just not supported by YunoHost (the whole metronome integration is not really well-maintained :/)