Node.js http create server from configuration json

var http = require("http");
var fs = require("fs");
console.log("Starting...");

var config = JSON.parse(fs.readFileSync("config.json"));
var host = config.host;
var port = config.port;

var server = http.createServer( function (request, response) {
  console.log("Got a request: " + request.url);
  fs.readFile("." + request.url, function (error, data) {
    if (error) {//from   w  ww. j a  va2s .co  m
      response.writeHead(404, {"Content-type": "text/plain"});
      response.end("File not found.");
    } else {
      response.writeHead(200, {"Content-type": "text/html"});
      response.end(data);
    }
  });
});

server.listen(port, host, function () {
  console.log("Listening...");
});