Create a file
wsgi.py under your project with the following contents, then point Gunicorn at it.
from my_project import create_app app = create_app()
gunicorn -w 4 my_project.wsgi:app # -w 4 specifies four worker processes
If you’re using the application factory pattern, Gunicorn allows specifying a function call like
my_project:create_app(). For most cases, you can the skip making a
wsgi.py file and tell Gunicorn how to create your app directly.
gunicorn -w 4 "my_project:create_app()"
Note that the quotes are necessary in some shells where parentheses have special meaning.