I am using a ec2 server running ubuntu and nodejs. I thought this would create a valid server that would respond if I went to my ec2 web address.
var http = require("http");
var port = 80; 
var serverUrl = "0.0.0.0";
console.log("Starting web server at " + serverUrl + ":" + port); http.createServer(      
function(req, res) {
  timestamp = new Date();
  console.log("Request for URL " + req.url + " received at " + timestamp);
  if (req.url === '/error') {
    console.log('Throwing an error');
    throw "Oops";
  }
  res.end("Hello World " + timestamp);
}).listen(port, serverUrl);
I have used nodejs and espesially express for a while but never have tried to deploy it myself on a vps, any advice is appreciated.