🔼 Since resolved_progo_map.conf doesn't change content per host, we should put it in /docker/rootfs/etc/nginx/conf.d/include/resolved_proto_map.conf instead.

backend/templates/_resolved_proto_map.conf

@@ -1,7 +0,0 @@
-# Resolve the effective protocol: use X-Forwarded-Proto if set
-# (e.g., from proxies like Cloudflare or AWS)
-# otherwise fall back to the current scheme.
-map $http_x_forwarded_proto $resolved_proto {
-    default $scheme;
-    ~.+ $http_x_forwarded_proto;
-}

backend/templates/proxy_host.conf

@@ -4,7 +4,7 @@
 
 {% include "_hsts_map.conf" %}
 
-{% include "_resolved_proto_map.conf" %}
+include conf.d/include/resolved_proto_map.conf;
 
 server {
   set $forward_scheme {{ forward_scheme }};