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README.md

@@ -31,6 +31,12 @@ docker compose exec php php bin/console app:promote-admin you@example.com
 
 5) Visit `http://localhost:8000` to search for albums.
 
+## Database driver
+
+- Set `DATABASE_DRIVER=postgres` (default) to keep using the Postgres 16 container defined in `docker-compose.yml`.
+- Set `DATABASE_DRIVER=sqlite` to run against a self-contained SQLite file stored at `var/data/database.sqlite`.
+- When `DATABASE_DRIVER=sqlite`, the `DATABASE_URL` env var is ignored. Doctrine will automatically create and use the SQLite file; override the default location with `DATABASE_SQLITE_PATH` if needed.
+
 ## Features
 
 - Spotify search with Advanced filters (album, artist, year range) and per-album aggregates (avg/count)
@@ -45,17 +51,6 @@ docker compose exec php php bin/console app:promote-admin you@example.com
 ## Rate limiting & caching
 
 - Server-side Client Credentials; access tokens are cached.
-- Requests pass through a throttle and 429 Retry-After backoff. GET responses are cached.
-- Tunables (optional):
-
-```bash
-# seconds per window (default 30)
-SPOTIFY_RATE_WINDOW_SECONDS=30
-# max requests per window (default 50)
-SPOTIFY_RATE_MAX_REQUESTS=50
-# max requests for sensitive endpoints (default 20)
-SPOTIFY_RATE_MAX_REQUESTS_SENSITIVE=20
-```
 
 ## Docs
 
@@ -67,8 +62,7 @@ See `/docs` for how-tos and deeper notes:
 - Spotify integration: `docs/04-spotify-integration.md`
 - Reviews and albums: `docs/05-reviews-and-albums.md`
 - Admin & site settings: `docs/06-admin-and-settings.md`
-- Rate limits & caching: `docs/07-rate-limits-and-caching.md`
-- Troubleshooting: `docs/08-troubleshooting.md`
+- Troubleshooting: `docs/07-troubleshooting.md`
 
 ## License