Update app.py

app.py

@@ -9,8 +9,11 @@ import requests
 app = Flask(__name__)
 CORS(app)
 
+def get_client_ip():
+    return request.headers.get(os.getenv('head'), get_remote_address())
+
 limiter = Limiter(
-    key_func=get_remote_address,
+    key_func=get_client_ip,
     app=app,
     default_limits=["8 per minute"]
 )