app.js

var http = require('http');

var server = http.createServer(function(req, res) {
	res.writeHead(200, { 'Content-Type': 'text/plain' });
	res.end('hello world');
});

server.listen(3000);

if (typeof PhusionPassenger !== 'undefined') {
	PhusionPassenger.on('exit', function() {
		console.log('exit hook called');
		process.exit(0);
	});
}