docs: def load_heroes():
      """
      Load hero details from JSON file into memoy
      """
  
      filename = os.path.join(os.path.dirname(__file__), "data", "heroes.json")
  
      with open(filename) as f:
          heroes = json.loads(f.read())["result"]["heroes"]
          for hero in heroes:
              HEROES_CACHE[hero["id"]] = hero