old_contents: """Set config values"""
  
  import os
  
  DATABASE_URL = os.environ.get('DATABASE_URL')
  DEBUG = os.environ.get('DEBUG', False)
  HOST = os.environ.get('HOST', 'localhost:9090')
  
  
  if not DATABASE_URL:
      raise Exception('Please set `DATABASE_URL` environment variable.')
  
new_contents: """Set config values"""
  
  import os
  
  DATABASE_URL = os.environ.get('DATABASE_URL')
  DEBUG = os.environ.get('DEBUG', True)
  HOST = os.environ.get('HOST', 'localhost:9090')
  
  if not DATABASE_URL:
      raise Exception('Please set `DATABASE_URL` environment variable.')
  
subject: change default value of `DEBUG` config to `True`