old_contents: var express  = require('express'),
      http     = require('http'),
      app      = module.exports.app = express(),
      server   = http.createServer(app)
      io       = require('socket.io').listen(server),
  
      mongoose       = require('mongoose'),
      morgan         = require('morgan'),
      bodyParser     = require('body-parser'),
      methodOverride = require('method-override'),
      flash          = require('connect-flash'),
      port           = process.env.port || 80,
          
      session       = require('express-session'),
      sessionConfig = require('./config/session.js'),
      passport      = require('passport');
  
  // configuration =================
  
  mongoose.connect('mongodb://heroku_prmdxm2z:ae4i7029vf3dvlufs4i5413l12@ds061374.mongolab.com:61374/heroku_prmdxm2z');     // connect to mongoDB database on bound localhost
  
  app.use(express.static(__dirname + '/public'));                 // set the static files location /public/img will be /img for users
  app.use(morgan('dev'));                                         // log every request to the console
  app.use(bodyParser.urlencoded({'extended':'true'}));            // parse application/x-www-form-urlencoded
  app.use(bodyParser.json());                                     // parse application/json
  app.use(bodyParser.json({ type: 'application/vnd.api+json' })); // parse application/vnd.api+json as json
  app.use(methodOverride());
  
  require('./config/passport')(passport);
  
  app.use(session({secret : sessionConfig.secret }));
  app.use(passport.initialize());
  app.use(passport.session());
  app.use(flash());
  
  require('./routes/routes')(app, passport, io);
  
  app.set('view-engine', 'ejs');
  
  //app.get('/', function(req, res) {
  //    res.sendFile('./public/index.html');
  //});
  
  io.on('connection', function (socket) {
      console.log('Socket succesfully connected with id: '+socket.id);
  });
  
  // listen (start app with node server.js) ======================================
  server.listen(port);
new_contents: var express  = require('express'),
      http     = require('http'),
      app      = module.exports.app = express(),
      server   = http.createServer(app)
      io       = require('socket.io').listen(server),
  
      mongoose       = require('mongoose'),
      morgan         = require('morgan'),
      bodyParser     = require('body-parser'),
      methodOverride = require('method-override'),
      flash          = require('connect-flash'),
      port           = process.env.PORT || 80,
          
      session       = require('express-session'),
      sessionConfig = require('./config/session.js'),
      passport      = require('passport');
  
  // configuration =================
  
  mongoose.connect('mongodb://heroku_prmdxm2z:ae4i7029vf3dvlufs4i5413l12@ds061374.mongolab.com:61374/heroku_prmdxm2z');     // connect to mongoDB database on bound localhost
  
  app.use(express.static(__dirname + '/public'));                 // set the static files location /public/img will be /img for users
  app.use(morgan('dev'));                                         // log every request to the console
  app.use(bodyParser.urlencoded({'extended':'true'}));            // parse application/x-www-form-urlencoded
  app.use(bodyParser.json());                                     // parse application/json
  app.use(bodyParser.json({ type: 'application/vnd.api+json' })); // parse application/vnd.api+json as json
  app.use(methodOverride());
  
  require('./config/passport')(passport);
  
  app.use(session({secret : sessionConfig.secret }));
  app.use(passport.initialize());
  app.use(passport.session());
  app.use(flash());
  
  require('./routes/routes')(app, passport, io);
  
  app.set('view-engine', 'ejs');
  
  //app.get('/', function(req, res) {
  //    res.sendFile('./public/index.html');
  //});
  
  io.on('connection', function (socket) {
      console.log('Socket succesfully connected with id: '+socket.id);
  });
  
  // listen (start app with node server.js) ======================================
  server.listen(port);
subject: Fix typo