app.js

var express = require('express');
var path = require('path');
var expressValidator = require('express-validator');
var session = require('express-session');
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;
var bodyParser = require('body-parser');
var flash = require('connect-flash');

var routes = require('./routes/index');
var users = require('./routes/users');

var app = express();

// View Engine
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

// Set Static Folder
app.use(express.static(path.join(__dirname, 'public')));
app.use('/css', express.static(__dirname+ '/node_modules/bootstrap/dist/css'));

// BodyParser
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

// Express Session Middleware
app.use(session({
    secret: 'secret',
    saveUninitialized: true,
    resave: true
}));

// Passport Middleware
app.use(passport.initialize());
app.use(passport.session());

// Express Validator Middleware
app.use(expressValidator({
  errorFormatter: function(param, msg, value) {
      var namespace = param.split('.')
      , root    = namespace.shift()
      , formParam = root;

    while(namespace.length) {
      formParam += '[' + namespace.shift() + ']';
    }
    return {
      param : formParam,
      msg   : msg,
      value : value
    };
  }
}));

// Connect-Flash Middleware
app.use(flash());
app.use(function (req, res, next) {
  res.locals.messages = require('express-messages')(req, res);
  next();
});

app.get('*', function(req, res, next){
    res.locals.user = req.user || null;
    next();
});

// Define Routes
app.use('/', routes);
app.use('/users', users);

app.listen(3000);
console.log('Server started on port 3000');