Now that you have everything installed and confirmed that it's all working, you can write your first quick app that will use both Node and MongoDB. This will prove that your environment is good to go, and that you're ready to get started. In addition, it will give you a brief taste of the world of Node and MongoDB development! Don't worry if a lot of the following is confusing or just doesn't make sense to you, it will all be made clear throughout the rest of the book!
To begin with, we need to create a folder for our application where this application's specific code will reside, as follows:
$ mkdir testapp
$ cd testapp
