Add my docker and docker_compose role

Do this in preparation for the keycloak deployment.

playbooks/roles/docker_compose/handlers/main.yaml

@@ -0,0 +1,6 @@
+- name: docker compose down
+  ansible.builtin.command:
+    cmd: /usr/bin/docker compose down
+    chdir: /ansible_docker_compose
+  become: true
+  changed_when: true  # This is always changed.