Variable Name	Type	Default Value	Description
MYAPP_DEBUG	Boolean	False	Whether to enable debug logging.
MYAPP_NO_DEFAULT	Boolean		A variable with no default value, which makes it mandatory.
MYAPP_URL	String	http://localhost:5000	The URL of the application.
MYAPP_SERVICE_HOST	str	localhost	The host of the service.
MYAPP_SERVICE_PORT	int	3000	The port of the service.

Reference test MY_APP_DEBUG