How to configure mongoDB on a node.js application when hosting online?

So it's time for my node.js/express application to go live. It works fine at my local development environment. I'm new to both node.js and mongoDB. I decided to us nodejitsu as hoster.

The first thing i need to do is to create the database at nodejitsu. Then i must configure my code so it connects to the created database. How should this be configured? In my local development environment the objects have just been stored like a seed and not actually a database.

I'm feeling i missing some major parts here on how to get my application up and running. Would realy appreciate if someone could help me sort out it a bit.

Heres the code that works localy:

var mongo = require('mongodb');

var Server = mongo.Server,
    Db = mongo.Db,
    BSON = mongo.BSONPure;

var server = new Server('localhost', 27017, {auto_reconnect: true});
db = new Db('spotdb', server);

db.open(function(err, db) {
    if(!err) {
        console.log("failed to connect to 'spotdb' database");
        db.collection('spots', {strict:true}, function(err, collection) {
            if (err) {
                console.log("The 'spots' collection dont exist. Creating it with dbseed");
                dbSeed();
            }
        });
    }
});


var dbSeed = function() {

    var spots = [
    {
        name: "A name",
        description: "Description",
        picture: "picture.jpg"
    },
    {
        name: "Number two",
        description: "Descp",
        picture: "image.jpg"
    }];

    db.collection('spots', function(err, collection) {
        collection.insert(spots, {safe:true}, function(err, result) {});
    });

};