The docker-compose.yml file is broken into sections, each section represents a single container which, when combined with the other containers, create the service.

3. We’ll deploy a service that uses the secret created from a file. The command for this might be like docker service create --name tr_test_service --secret tr_secret redis:alpine.

But there are tools like docker-compose to automate this workflow, which are very powerful when running multiple containers/services.