implemented compose by url, parse, local yaml.

roles/docker_app/README.md

@@ -1,10 +1,12 @@
 # docker_app
 
-Shared implementation role for single-container Docker Compose applications.
+Shared adapter role for single-container Docker Compose applications.
 Application roles set `docker_app_*` variables and include this role.
 
+`docker_app` validates single-container app inputs and delegates the common
+Compose lifecycle to `compose_project`.
+
 It supports direct host-port publishing with UFW rules or Traefik routing via
 labels and a shared Docker network.
 
 Tags: `docker_app`, `docker`, `config`, `compose`, `firewall`.
-