server.js

var express = require('express');
var http = require('http');
var path = require('path');
var app = express();
var favicon = require('serve-favicon');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');

app.set('port', 8888);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

app.use(favicon(path.join(__dirname,'public','favicon.ico')));
app.use(bodyParser.json());
app.use(express.static(path.join(__dirname, 'public')));
app.use(bodyParser.urlencoded({extended: false}));

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});

http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});