update mosquitto broker conf and volume info

docker/mosquitto.conf

@@ -2,9 +2,8 @@ persistence true
 persistence file mosquitto.db
 persistance_location mosquitto/data
 
-persistance true
-persistance_location /var/lib/mosquitto/
 
+log_dest_file mosquitto/log/mosquitto.log
 
 per_listener_settings true
 listener 1883