For the first argument in our case, we're going to start off with mongodb://. When we connect to a MongoDB database, we want to use the mongodb protocol like this:
MongoClient.connect('mongodb://')
Next up, it's going to be at localhost since we're running it on our local machine, and we have the port, which we have already explored: 27017. After the port, we need to use / to specify which database we want to connect to. Now, in the previous chapter, we used that test database. This is the default database that MongoDB gives you, but we could go ahead and create a new one. After the /, I'm going to call the database TodoApp, just like this:
MongoClient.connect('mongodb://localhost:27017/TodoApp');
