server1.js

var http = require('http');
    var s = http.createServer(function(req,res){
        res.writeHead(200,{'content-type' : 'text/plain'});
        res.write('hello');
        setTimeout(function(){
            res.end("world\n")
        },2000);
    });
    s.listen(3000);

server2.js

var Hapi = require('hapi');
var path = require('path');

module.exports.start = function (done) {
    var server = Hapi.createServer('0.0.0.0', 3000);

    server.start(function () {
        console.log('Dating-With-Node Server started at: ' + server.info.port);
    });
};

// If someone ran: "node server.js" then automatically start the server
if (path.basename(process.argv[1],'.js') == path.basename(__filename,'.js')) {
    module.exports.start()
}