proxy to nginx default port

slave/config.json

@@ -8,7 +8,7 @@
     {
 	    "factory-name-for-led1-C00FF33": {"url": "localhost:1234"},
 	    "useless-device-MQYOK7N1WA*#22": {"url": "localhost:7777"},
-      "raspberry-cam": {"url": "localhost:8989"},
+      "raspberry-cam": {"url": "localhost:80"},
       "motion-sensor": {"url": "localhost:1111"},
       "speaker": {"url":"localhost:3333"}
     }