Node.js Getting started with Node.js Deploying your application online
Example
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.
