old_contents: from transporter import create_app
  
  
  application = create_app(__name__)
  
  
  if __name__ == '__main__':
      application.run(host='0.0.0.0', debug=True)
  
new_contents: import os
  
  from transporter import create_app
  
  
  application = create_app(__name__)
  
  
  if __name__ == '__main__':
      host = os.environ.get('HOST', '0.0.0.0')
      port = int(os.environ.get('PORT', 8002))
      debug = bool(os.environ.get('DEBUG', False))
      application.run(host, port=port, debug=debug)
  
subject: Read in some environment variables