server.js

var express = require('express'),
    bodyParser = require('body-parser'),
    cookieParser = require('cookie-parser'),
    cookieSession = require('cookie-session'),
    serveStatic = require('serve-static'),
    expressValidator = require('express-validator'),
    passport = require('passport'),
    crypto = require('crypto'),
    flash = require('connect-flash'),
    mongoose = require('mongoose'),
    morgan       = require('morgan');

var handlebars = require('express-handlebars').create({
    layoutsDir: "views/layouts",
    partialsDir: "views/partials",
    defaultLayout: 'main'
});

//Intialise express framework
var app = express();

app.use(morgan('dev')); // log every request to the console
mongoose.connect('mongodb://127.0.0.1:27017/samplenodejsapp')

require('./src/middleware/passport')(passport);

app.use(cookieParser('SampleNode.jsApp')); //read cookies
app.use(cookieSession({
    keys: ['key1', 'key2']
}));

app.use(bodyParser.json()); // get information from html forms
app.use(bodyParser.urlencoded({
    extended: true
}));
app.set('views', __dirname + '/views'); // set template directory
app.set('view engine', 'handlebars'); //set view engine to handlebars
app.engine('handlebars', handlebars.engine);
app.use(expressValidator());
app.use(passport.initialize());
app.use(passport.session()); //persistant login sessions
app.use(serveStatic('./public')); //serve static files from public directory
app.use(flash()); //used to display flash messages from sessions

require('./routes')(app, passport); // include routes
app.listen(process.env.PORT || 3000);

console.log('Listening on port 3000');