In order to deploy our shopping list application, we need to perform exactly the same steps as we have done with the Pomodoro application.

Create a new application on your Heroku dashboard and connect it to your GitHub shopping list project. After that, copy the server.js file from the Pomodoro application, deal with the dependencies in the package.json file, and create postinstall and start scripts.

However, we still have one step left. Do not forget about our backend server that serves the REST API for the shopping lists. We need to run it as well.

Or even better, why do we need to run two servers if we can have just one server that does everything? We can integrate our JSON server with our express server by providing it the routing path to serve the shopping list endpoint, let's say api. Open the server.js file, import the jsonServer dependency there, and tell the express app to use it. So, your server.js file will look like the following:

//server...