What is Docker compose?

Docker compose is a tool for defining and running multi-container Docker applications. One will require to create a Compose file  to configure the application's services. The following steps are required to be taken in order to work with Docker compose:

• Define the application’s environment with a Dockerfile so it can be reproduced anywhere.
• Define the services that make up the application in docker-compose.yml so they can be run together in an isolated environment.
• Lastly, run docker-compose, and Compose will start and run the entire application.

As we are going to set up a multi-container application using Tomcat and MySQL as different containers, we will use Docker compose to configure both of them, and then, assemble the application.