Simple nodejs server with redis connection

server.js

var http = require('http');
var redis = require('redis');
var client = redis.createClient(6379, 'app_db');

http.createServer(function (req, res) {
  client.incr('counter', function (err, reply) {
    console.log('Counter value', reply);
    res.writeHead(200, {'Content-Type': 'application/json'});
    res.end(JSON.stringify({ counter: reply }) + "\n");
  });
}).listen(3000, '0.0.0.0');

console.log('Server running at http://0.0.0.0:3000/');