Possible to publish pfSense GUI?

[morgansimonsen]

Hello. I am trying to proxy the GUI of a pfSense firewall. Current setup is:
pfsense:
title: pfSense
icon: mdi:router-wireless-settings
url: https://10.1.1.1

This shows a page, but all of the CSS is gone. I can log in initially, but all the URLs on the following pages drop the /pfsense/ segment from the URL causing them to give 404.

When the page loads the HA side panel is still visible, but after a second or two is disappears and the (broken) pfSense GUI takes the entire window.

There is not much information out there about reverse proxying the pfSense GUI, but I found this: https://forum.netgate.com/post/102333