change from sync to async and from flask to quart

server/storage/LocalStorage.py

@@ -28,7 +28,7 @@ class LocalStorage:
 
     return os.path.join(storage_folder, file_name)
 
-  def save(self, game_board:GameBoard):
+  async def save(self, game_board:GameBoard):
     game_type = game_board.get_type_of_game()
     save_file_path = self._get_correct_folder_for_save_file(
       game_board,
@@ -38,7 +38,7 @@ class LocalStorage:
       True if game_board.winner_snake_names and "me" in game_board.winner_snake_names else False
     )
 
-    save_file(save_file_path, {
+    await save_file(save_file_path, {
       "winner": game_board.winner_snake_names,
       "game": {
         "url": game_board.url,