Issue Add XFP header within Docker extension nginx proxy

[wilei]

Hi!

Is it possible to add XFP / X-Forwarded-Proto HTTP-header when nginx is doing proxying to the Docker container?

Now configuration sets just X-Real-IP and X-Forwarded-For headers, but no X-Forwarded-Proto header, and therefore the standard HTTP/HTTPS detections are not working at all.

The XFP header could be added by just adding the following line to Docker extension config in every location with proxy_pass:

proxy_set_header X-Forwarded-Proto $scheme;

Or is there some template to edit and add the line in it?

(I'm using Plesk 17.8.11 on Ubuntu 16.04.5 with Docker extension version 1.3.1-126)