You can not select more than 25 topicsTopics must start with a chinese character,a letter or number, can include dashes ('-') and can be up to 35 characters long.
If the env or gunicorn has some error, there will not be any error in console
or error log file when we set the subprocss stdout to devnull.
So I set it to None it will inhert its parent process stdout.
When gunicorn cause error, it will show error in console.