Describe the bug
Hi, I need to override the default proxy_set_header Host $host to proxy_set_header Host $http_host for a specific Proxy Host, since it's required by the app I'm trying to Proxy (more info here)

To Reproduce
Create a Proxy Host
Go to Advanced and add proxy_set_header Host $http_host;
The value is not applied and the application throws an error.

Expected behavior
I am expecting this value to be added.

Screenshots

Operating System

• Nginx Proxy Manager on Home Assistant OS running on Pi4

Additional context
If on the host I edit /etc/nginx/conf.d/include/proxy.conf and change the default value, it works, but it's a temporary change.