Congratulations on successfully making it through the driest chapter in the book! A cruel but necessary exercise. In this chapter, you learned the difference between Ring and the Ring Server. We got a taste of how to modify route behavior by creating a new route handler, and played around with a bit of middleware. Finally, you learned how to start and stop the Ring Server from both the REPL and the command line, and how to configure each, respectively. In the next chapter, we're going to take a look at a developer's best and only set of binoculars—logging.