feat(jigasi,jicofo,jvb,jibri,prosody): add healthcheck.sh scripts and prosody http_health mod

prosody/rootfs/defaults/prosody.cfg.lua

@@ -99,6 +99,7 @@ modules_enabled = {
 		--"watchregistrations"; -- Alert admins of registrations
 		--"motd"; -- Send a message to users when they log in
 		--"legacyauth"; -- Legacy authentication. Only used by some old clients and bots.
+		"http_health";
 		{{ if eq .Env.PROSODY_MODE "brewery" -}}
 		"firewall"; -- Enable firewalling
 		"secure_interfaces";

prosody/rootfs/usr/local/bin/healthcheck.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+curl --fail-with-body http://127.0.0.1:5280/health