add docstring for establishment from carousel

apps/establishment/views/web.py

@@ -226,7 +226,20 @@ class EstablishmentFavoritesCreateDestroyView(FavoritesCreateDestroyMixinView):
 
 
 class EstablishmentCarouselCreateDestroyView(CarouselCreateDestroyMixinView):
-    """View for create/destroy establishment from carousel."""
+    """
+    EstablishmentCarousel by slug create/destroy establishment from carousel.
+
+    **POST**
+    ```
+    Implement create EstablishmentCarousel method
+    ```
+
+    **DELETE**
+    ```
+    Implement delete EstablishmentCarousel method
+    ```
+
+    """
 
     lookup_field = 'slug'
     _model = models.Establishment