Face Detector container now able to be created, started and stopped from within miku-bot container

readmes/ON_DEMAND_FACE_DETECTION.md

@@ -108,6 +108,10 @@ async def _detect_face(self, image_bytes: bytes, debug: bool = False):
         # 4. ALWAYS stop container to free VRAM
         if face_detector_started:
             await self._stop_face_detector(debug=debug)
+
+### Automatic creation
+
+If the `anime-face-detector` container does not exist (for example after a reboot or `docker compose down`), the bot will now attempt to create and start the container automatically via the Docker Engine API. This avoids requiring a manual `docker compose --profile tools up -d` step.
 ```
 
 ## Container States