make HTTP port configurable via config.json

app.js

-
 var config = require('./config.json');
 
 var pathPhotos = config.pathPhotos;

bin/www

 #!/usr/bin/env node
+
+var config = require('../config.json');
+
 var debug = require('debug')('foo');
 var app = require('../app');
 
-app.set('port', process.env.PORT || 3000);
+app.set('port', config.httpPort || 3000);
 
 var server = app.listen(app.get('port'), function() {
-  debug('Express server listening on port ' + server.address().port);
+  console.log("Express server listening on port " + app.get('port'));
 });

config.json-dist

@@ -3,4 +3,5 @@
   "previewWidth"	: 1920,
   "previewHeight"	: 1080,
   "broadcastAddr"	: "192.168.0.255"
+  "httpPort"      : 3080
 }