jvb: make jvb apis available from outside the container

jvb/rootfs/defaults/sip-communicator.properties

@@ -28,3 +28,5 @@ org.jitsi.videobridge.rest.COLIBRI_WS_DISABLE=false
 org.jitsi.videobridge.rest.jetty.port=9090
 org.jitsi.videobridge.rest.COLIBRI_WS_DOMAIN={{ $WS_DOMAIN }}
 org.jitsi.videobridge.rest.COLIBRI_WS_TLS=true
+
+org.jitsi.videobridge.rest.private.jetty.host=0.0.0.0