Add my docker and docker_compose role

Do this in preparation for the keycloak deployment.

playbooks/roles/docker_compose/meta/argument_specs.yaml

@@ -0,0 +1,26 @@
+argument_specs:
+  main:
+    options:
+      docker_compose__compose_file_content:
+        description: >-
+          The content of the Compose file at
+          `/ansible_docker_compose/compose.yaml`.
+        type: str
+        required: true
+      docker_compose__configuration_files:
+        description: >-
+          A list of configuration files to be deployed in the
+          `/ansible_docker_compose/configs/` directory.
+        type: list
+        elements: dict
+        required: false
+        default: [ ]
+        options:
+          name:
+            description: The name of the configuration file.
+            type: str
+            required: true
+          content:
+            description: The content of the configuration file.
+            type: str
+            required: true