The testapp folder that we just created will be the root of our sample Node application. Even though it's not necessary, it's important and also best practice that we should create the package.json file for our Node app, which will hold the necessary data regarding the application such as its version, name, description, development, and runtime dependencies. This can be done by issuing the following command from the testapp folder root:

    $ npm init 

This command will follow up by asking you a few questions, such as the name and version number of your newly created application. It is not necessary that you fill in all the details in one go, and you can skip the steps by pressing Enter and the default values will be entered, which you may update later.