Summary
In this chapter, we stepped slightly aside from Express.js related topics. Instead, we concentrated on how to productionize our code base by providing up-to-date API documentation, along with the API itself. We had our application invest in precautionary measures for ensuring backward compatibility by implementing more complex unit tests that actually target close-to-real-life implementation. Finally, we decided to look into the future, which is all about microservices. Ensure that you keep this hot topic up in your skill-list; it will inevitably evolve in the near future, and the more you know about it, the better!
