node js - set response header

// By: facebook.com/muhammad.sukron.52
// ex: http://prntscr.com/ayyww5

var http = require('http');

var server = http.createServer(function(req, res) {
    var title = 'Hello World';
    res.writeHead(200, {
        'Content-length' : title.length,
        'Content-type' : 'Text/HTML',
        'Content-header' : 'Learn Node JS'
    });
    res.write(title);
    res.end();
});

server.listen(3400);
console.log('server is running');