Now for the advanced stuff. Docker Compose is a Docker tool used to define and run multi-container applications. With Compose, you use a YAML file to configure your application’s services and create all the app's services from that configuration.

Think of docker-compose as an automated multi-container workflow. Compose is an excellent tool for development, testing, CI workflows, and staging environments. According to the Docker documentation, the most popular features of Docker Compose are:

Multiple isolated environments on a single host

Preserve volume data when containers are created

Only recreate containers that have changed

Variables and moving a composition between environments

Orchestrate multiple containers that work together