Simple node.js HTTP server

server.js

var http = require("http");
var unum = 0;
var port = 8888;

http.createServer(function(request, response) {
  response.writeHead(200, {"Content-Type": "text/plain"});
  response.write("Hello World");
  unum = unum + 1;
  console.log("Users visited: " + unum);
  response.end();
}).listen(port);

console.log("Server started on port " + port);