Serving static files with an Express server on Heroku

server.js

var express = require('express');
var app = express();

app.use(express.static('public'));

var port = process.env.PORT || 8080;

app.get('/', function (req, res) {
  res.send('Hello World!');
});

app.listen(port, function () {
  console.log('Example app listening on port 3000!');
});