old_contents: import os
  
  TELEGRAM_ACCESS_TOKEN = os.environ['TELEGRAM_ACCESS_TOKEN']
  GOODREADS_API_KEY = os.environ['GOODREADS_API_KEY']
  GOOGLE_DEV_API_KEY = os.environ['GOOGLE_DEV_API_KEY']
  GOOGLE_CUSTOM_SEARCH_CX = os.environ['GOOGLE_CUSTOM_SEARCH_CX']
  
  # Telegram Webhook settings
  WEBHOOK_URL = os.environ['WEBHOOK_URL']
  
  # Group restrictions
  # Chat is either private message or group chat
  # allowing Laozi only in groups but not in `private` or `channel`
  ALLOWED_CHAT_TYPES = ['group', 'supergroup']
  # Laozi will interact only with following Chat groups or private ids
  ALLOWED_CHAT_IDS = [-1001091893296, -1001013427720]
  
new_contents: import os
  
  TELEGRAM_ACCESS_TOKEN = os.environ['TELEGRAM_ACCESS_TOKEN']
  GOODREADS_API_KEY = os.environ['GOODREADS_API_KEY']
  GOOGLE_DEV_API_KEY = os.environ['GOOGLE_DEV_API_KEY']
  GOOGLE_CUSTOM_SEARCH_CX = os.environ['GOOGLE_CUSTOM_SEARCH_CX']
  
  # Telegram Webhook settings
  WEBHOOK_URL = os.environ['WEBHOOK_URL']
  
  # Group restrictions
  # Chat is either private message or group chat
  # allowing Laozi only in groups but not in `private` or `channel`
  ALLOWED_CHAT_TYPES = ['group', 'supergroup']
  # Laozi will interact only with following Chat groups or private ids
  ALLOWED_CHAT_IDS = [-1001091893296, -1001013427720, -1001015833661]
  
subject: add MV