Fix avatar upload

- Fix the display of an already updated avatar
- Fix the storage policy. Only authenticated users can upload an avatar

setupSupabaseSQL.sql

@@ -33,9 +33,9 @@ create policy "Avatar images are publicly accessible."
   on storage.objects for select
   using ( bucket_id = 'avatars' );
 
-create policy "Anyone can upload an avatar."
+create policy "Any authenticated user can upload an avatar."
   on storage.objects for insert
-  with check ( bucket_id = 'avatars' );
+  with check ( bucket_id = 'avatars' and auth.role() = 'authenticated' );
 
   -- inserts a row into public.profiles
 create function public.handle_new_user()