Implement this lib to trigger external events- ext_events.lib.lua

Hello everyone how to enable this library “ext_events.lib.lua” in prosody to be able to make external calls the jitsi thanks, I get this notice:
info BOSH client disconnected: session close
warn A module has been configured that triggers external events.
warn Implement this lib to trigger external events.
info BOSH client disconnected: session close

note: mount local server with docker and publish it