You almost know it all, but there are a few more things you should master. This final part of the book focuses on some important practices you’ll use before you take your containerized apps to production. You’ll learn about optimizing Docker images and integrating your apps with the Docker platform--to read configuration in and write log entries out. You’ll also learn some very useful architectural approaches: using a reverse proxy and a message queue. They may sound scary, but they’re powerful and straightforward with Docker.