I believe I would need the hostname / port to serve my WSGI application, according to this page.
I'm trying to combine Dash (by plotly), within a Flask application, hence I will need to use the run_simple function.
If there's any other way to achieve what I'm looking to do, please do shed some light!
EDIT: Sorry resolved! Turns out I don't have to call run_simple, importing application
suffices!