We don't want to have to restart the local server every time we make a change to our files. We can use `nodemon` instead of `node` when running our `index.js` file so that file-changes are immediately registered without the need for a restart.
This is a wrapper around the `node` command so it doesn't require any configuration. Once installed, update your start script from `node index.js` to `nodemon index.js`.
