Update starlette docs

docs/starlette.md

@@ -30,6 +30,24 @@ AIKIDO_BLOCKING=true
 
 It's recommended to enable this on your staging environment for a considerable amount of time before enabling it on your production environment (e.g. one week).
 
+## Rate limiting and user blocking
+If you want to add the rate limiting feature to your app, modify your code like this:
+```py
+...
+from starlette.middleware import Middleware
+from aikido_zen.middleware import AikidoStarletteMiddleware
+
+app = Starlette(routes=[
+    ...
+], middleware=[
+    ...
+    # Set User middleware
+    ...
+    Middleware(AikidoStarletteMiddleware),
+    ...
+])
+```
+
 ## Debug mode
 
 If you need to debug the firewall, you can run your code with the environment variable `AIKIDO_DEBUG` set to `true`: