MEAN Stack Heroku app crash

My application crash when I deploy my project into heroku. The logs give this error:

2017-05-19T22:58:27.483032+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=caretel.herokuapp.com request_id=1a2b4b01-467c-4bea-bb29-c05ce3cd949b fwd="183.171.182.30" dyno= connect= service= status=503 bytes= protocol=https
2017-05-19T22:58:28.225850+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=caretel.herokuapp.com request_id=db9b693c-fcaa-44dd-89ca-6d97463b95ac fwd="183.171.182.30" dyno= connect= service= status=503 bytes= protocol=https

Refer this picture for complete logs enter image description here

This is my starting file:

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var mongoose = require('mongoose');
var passport = require('passport');
require('./config/passport');
//Connect to local db
mongoose.connect('mongodb://localhost/office');

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

var app = express();

//express cors
app.use(function (req, res, next){
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization, sid");
  res.header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT");
  next();
});

//code for deploying into heroku
app.set('port', (process.env.PORT || 5000));
//code for deploying into heroku
//app.set('views', __dirname + '/views');
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
//code for deploying into heroku
//app.use(express.static(__dirname + '/public'));

app.use('/', index);
app.use('/users', users);
//app.use('/products', products);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

//code for deploying into heroku
app.get('/', function(request, response){
  response.render('pages/index');
});

//code for deploying into heroku
app.listen(app.get('port'), function(){
  console.log('Node app js running on port', app.get('port'));
});

//Tried code
/*app.listen(process.env.PORT || 3000, function(){
  console.log("Express server listening on port %d in %s mode", this.address().port, app.settings.env);
});

//Tried code
server.listen(config.port, function () {
  console.log('Express server listening on %d, in %s mode', config.port, app.get('env'));
});

//Tried code
var server_port = process.env.YOUR_PORT || process.env.PORT || 80;
var server_host = process.env.YOUR_HOST || '0.0.0.0';
server.listen(server_port, server_host, function() {
    console.log('Listening on port %d', server_port);
});*/

module.exports = app;

As for my package.son

{
    "name": "caretel",
    "version": "0.0.0",
    "private": true,
    "scripts": {
        "start": "node ./bin/www"
    },
    "dependencies": {
        "body-parser": "~1.15.2",
        "cookie-parser": "~1.4.3",
        "debug": "~2.2.0",
        "ejs": "~2.5.2",
        "express": "~4.14.0",
        "express-jwt": "^5.1.0",
        "jsonwebtoken": "^7.3.0",
        "mongoose": "^4.9.1",
        "morgan": "~1.7.0",
        "multer": "^1.3.0",
        "passport": "^0.3.2",
        "passport-local": "^1.0.0",
        "serve-favicon": "~2.3.0"
    },
    "engines": {
        "node": "7.2.0"
    }
}

I am sure that I'm using the right version of node because I'll get error messages if I use other version of node when run it in localhost:3000

FYI, for my app.json, I leave it empty without wring any codes.

I'm really new to heroku. I tried to deploy my project base on this tutorial: https://www.youtube.com/watch?v=AZNFox2CvBk

But I still can't deploy my project. How do I solve this?

via Azinuddin AleleCha