server.js

var app = require('http').createServer(handler),
    fs = require('fs');

var port = Number(process.env.PORT || 5000);
app.listen(port, function() {
  console.log("Listening on " + port);
});

function handler (req, res) {
  if(req.url            === "/"){
    fs.readFile(__dirname + '/www/index.html',
        function (err, data) {
          if (err) {
            res.writeHead(500);
            return res.end('Error loading index.html');
          }
          res.writeHead(200);
          res.end(data);
        });
  }
  else{
    fs.readFile(__dirname +"/www"+ req.url, function (err, data) {
      if (err) {
        res.writeHead(500);
        return res.end('Error loading ' +req.url);
      }
      res.writeHead(200);
      res.end(data);
    });
  }
}