Let's take a look at how a microservice with a RESTful interface will look if implemented with open source libraries based on the principles we've learned in first two sections of the book.

We will start with the discussion of the building blocks that constitute the application and how they connect together. Speaking of blocks, we'll need to briefly talk about the FS2 library, which is a foundation of other libraries we will use and thus shapes the ways we join them together. After that, we'll go over database migrations, project configurations, the implementation of the database logic, and the service layer. Naturally we conclude our discourse with the implementation of integration testing for the service we've built.