Add explicit detectors and optional auth

README.md

@@ -2,7 +2,37 @@
 
 FastAPI microservice that finds the primary subject in an image, draws a square around it, and returns a buffered crop.
 
-## Dev
+## UI
+
+The Tailwind UI is always available at `/`.
+
+## Auth
+
+Optional header auth is enabled when `FACE_LOCK_AUTH_TOKEN` is set.
+
+- Default header: `X-API-Key`
+- Alternate: `Authorization: Bearer <token>`
+- Override the header name with `FACE_LOCK_AUTH_HEADER`
+
+## API
+
+- `POST /api/focus`
+- `POST /api/focus/image`
+- `GET /health`
+
+## Detectors
+
+- `face`
+- `animal`
+- `person`
+- `subject`
+
+## Docs
+
+- OpenAPI UI: `/docs`
+- Project docs: `docs/README.md`
+
+## Run
 
 ```bash
 cp .env.example .env
@@ -10,8 +40,6 @@ pip install -r requirements.txt
 uvicorn app.main:app --reload --host 0.0.0.0 --port 8000
 ```
 
-Set `ENV=dev` to enable the Tailwind UI at `/`.
-
 ## Docker
 
 ```bash