We have come a long way to get here. Now is the time where we should take a look at how we currently run our application, and how we should prepare it for a production environment.

Currently, we use our application in a development environment while working on it. It is not highly optimized for performance or low bandwidth usage. We include developer functionalities with the code so that we can debug it properly. We also only generate one bundle, which is distributed at all times. No matter which page the user visits, the code for our entire application is sent to the user or browser.

For use in a real production environment, we should solve these issues. When setting the NODE_ENV variable to production, we remove most of the unnecessary development mechanics. Still, it would be great to send as little code to the user as possible to save bandwidth. We will take a look at this problem in the next section.