proxy_set_header Host              $host;
proxy_set_header X-Real-IP         $remote_addr;
proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
# Preserve the original scheme when a TLS terminator sits in front of the edge.
proxy_set_header X-Forwarded-Proto $fwd_proto;
proxy_set_header X-Forwarded-Host  $host;
proxy_redirect off;