fox-proxy-letsencrypt/rootfs/etc/nginx/proxy-params.conf

proxy_redirect off;
proxy_buffering off;
proxy_set_header        Host            $host;
proxy_set_header        X-Real-IP       $remote_addr;
proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header        X-Forwarded-Proto $scheme;