Using Docker Compose

You initially used Docker in Chapter 3, Extending Your Blog Application, and you have been using Docker throughout this book to run containers for different services, such as PostgreSQL, Redis, and RabbitMQ.

Each Docker container combines application source code with operating system libraries and dependencies required to run the application. By using application containers, you can improve your application portability. For the production environment, we will use Docker Compose to build and run multiple Docker containers.

Docker Compose is a tool for defining and running multi-container applications. You can create a configuration file to define the different services and use a single command to start all services from your configuration. You can find information about Docker Compose at https://docs.docker.com/compose/.

For the production environment, you will create a distributed application that runs across multiple Docker containers. Each Docker...