Add my docker and docker_compose role

Do this in preparation for the keycloak deployment.

playbooks/roles/docker_compose/README.md

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+# Role `docker_compose`
+
+A role for deploying a Docker-Compose-based application.
+It deploys the given Compose file as well as configuration files to the specified hosts and makes sure all services are up-to-date and running.
+The Compose file gets deployed to `/ansible_docker_compose/compose.yaml` and the configuration files get deployed into the `/ansible_docker_compose/configs/` directory.
+A use case for the deployment of the additional configuration files is Composes top-level element `configs` in conjunction with the `configs` option for services.
+
+## Supported Distributions
+
+The following distributions are supported:
+
+- Debian 11
+
+## Required Arguments
+
+For the required arguments look at the [`argument_specs.yaml`](./meta/argument_specs.yaml).
+
+## `hosts`
+
+The `hosts` for this role need to be the machines, for which you want to make sure the given Compose file is deployed and all services of it are up-to-date and running.
+
+## Links & Resources
+
+- <https://docs.docker.com/compose/>
+- <https://docs.docker.com/compose/compose-v2/>
+- <https://docs.docker.com/compose/production/>
+- <https://docs.docker.com/compose/startup-order/>
+- <https://docs.docker.com/compose/compose-file/>
+- <https://docs.docker.com/compose/compose-file/03-compose-file/>
+- <https://docs.docker.com/compose/compose-file/08-configs/>
+- <https://docs.docker.com/compose/compose-file/05-services/#configs>
+- <https://docs.docker.com/engine/reference/commandline/compose_up/>
+- <https://docs.docker.com/engine/reference/commandline/compose_ps/>
+- <https://docs.docker.com/engine/reference/commandline/compose_down/>