pgadmin4 running behind nginx

Hello everyone,

I have installed pgadmin4 on apache 2.2 with mod_wsgi, and it seems to be
working correctly.

The problem is I need to run nginx in front of it to enable https and
caching. When I try to access pgadmin with this setup I get errors in the
browser about some elements not being able to be loaded because they are
linked through http instead of https.

login:1 Mixed Content: The page at '
https://REMOVED-BY-ME/login?next=/browser/browser.css' was loaded over
HTTPS, but requested an insecure stylesheet '
http://REMOVED-BY-ME/login?next=%2Fbrowser%2Fbrowser.css'. This request has
been blocked; the content must be served over HTTPS.

This is OK at the login page, but once I login, I get the eternal pgadmin
is loading screen and a lot more of these same errors in my browser console.

My question is, how can I tell pgadmin4 what its base URL is ?

Thank you.