new_contents: import os
  env = os.environ['FLASK_ENV']
  
  CSRF_ENABLED=True
  SECRET_KEY='622fa765fa110611a164164fa347e941687cb7711c4ad6f1017a448cdd4c8c64'
  DEBUG=True
  TESTING=True
  
  if env == 'PRODUCTION':
    MONGODB_SETTINGS = {
      'DB': os.environ['MONGO_DB'],
      'host': os.environ['MONGOHQ_URL']
    }
  else:
    MONGODB_SETTINGS = {
      'DB': 'webstub',
      'HOST': 'localhost'
    }
  
subject: add config.py