Deploying your application online

When you deploy your app to a (Node.js-specific) hosted environment, this environment usually offers a PORT-environment variable that you can use to run your server on. Changing the port number to process.env.PORT allows you to access the application.

For example,

http.createServer(function(request, response) {
   // your server code
}).listen(process.env.PORT);

Also, if you would like to access this offline while debugging, you can use this:

http.createServer(function(request, response) {
  // your server code
}).listen(process.env.PORT || 3000);

where 3000 is the offline port number.