Update Nginx configuration to use $is_request_port and $request_port for improved compatibility

Signed-off-by: Eric Nemchik <eric@nemchik.com>

root/defaults/nginx/authelia-server.conf.sample

@@ -1,4 +1,4 @@
-## Version 2025/03/25 - Changelog: https://github.com/linuxserver/docker-swag/commits/master/root/defaults/nginx/authelia-server.conf.sample
+## Version 2026/07/18 - Changelog: https://github.com/linuxserver/docker-swag/commits/master/root/defaults/nginx/authelia-server.conf.sample
 # Make sure that your authelia container is in the same user defined bridge network and is named authelia
 # Rename /config/nginx/proxy-confs/authelia.subdomain.conf.sample to /config/nginx/proxy-confs/authelia.subdomain.conf
 
@@ -28,7 +28,7 @@ location @authelia_proxy_signin {
     add_header Set-Cookie $set_cookie;
 
     ## Set the $target_url variable based on the original request
-    set_escape_uri $target_url $scheme://$http_host$request_uri;
+    set_escape_uri $target_url $scheme://$host$is_request_port$request_port$request_uri;
 
     ## Translate the Location response header from the auth subrequest into a variable
     auth_request_set $signin_url $upstream_http_location;

root/defaults/nginx/authentik-server.conf.sample

@@ -1,4 +1,4 @@
-## Version 2025/03/25 - Changelog: https://github.com/linuxserver/docker-swag/commits/master/root/defaults/nginx/authentik-server.conf.sample
+## Version 2026/07/18 - Changelog: https://github.com/linuxserver/docker-swag/commits/master/root/defaults/nginx/authentik-server.conf.sample
 # Make sure that your authentik container is in the same user defined bridge network and is named authentik-server
 # Rename /config/nginx/proxy-confs/authentik.subdomain.conf.sample to /config/nginx/proxy-confs/authentik.subdomain.conf
 
@@ -38,10 +38,10 @@ location @goauthentik_proxy_signin {
     add_header Set-Cookie $set_cookie;
 
     ## Set the $target_url variable based on the original request
-    set_escape_uri $target_url $scheme://$http_host$request_uri;
+    set_escape_uri $target_url $scheme://$host$is_request_port$request_port$request_uri;
 
     ## Set the $signin_url variable
-    set $signin_url https://$http_host/outpost.goauthentik.io/start?rd=$target_url;
+    set $signin_url https://$host$is_request_port$request_port/outpost.goauthentik.io/start?rd=$target_url;
 
     ## Redirect to login
     return 302 $signin_url;

root/defaults/nginx/proxy.conf.sample

@@ -1,4 +1,4 @@
-## Version 2023/02/09 - Changelog: https://github.com/linuxserver/docker-swag/commits/master/root/defaults/nginx/proxy.conf.sample
+## Version 2026/07/18 - Changelog: https://github.com/linuxserver/docker-swag/commits/master/root/defaults/nginx/proxy.conf.sample
 
 # Timeout if the real server is dead
 proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;
@@ -21,11 +21,11 @@ proxy_no_cache $cookie_session;
 # Proxy Header Settings
 proxy_set_header Connection $connection_upgrade;
 proxy_set_header Early-Data $ssl_early_data;
-proxy_set_header Host $host;
+proxy_set_header Host $host$is_request_port$request_port;
 proxy_set_header Proxy "";
 proxy_set_header Upgrade $http_upgrade;
 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-proxy_set_header X-Forwarded-Host $host;
+proxy_set_header X-Forwarded-Host $host$is_request_port$request_port;
 proxy_set_header X-Forwarded-Method $request_method;
 proxy_set_header X-Forwarded-Port $server_port;
 proxy_set_header X-Forwarded-Proto $scheme;
@@ -33,5 +33,5 @@ proxy_set_header X-Forwarded-Server $host;
 proxy_set_header X-Forwarded-Ssl on;
 proxy_set_header X-Forwarded-Uri $request_uri;
 proxy_set_header X-Original-Method $request_method;
-proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
+proxy_set_header X-Original-URL $scheme://$host$is_request_port$request_port$request_uri;
 proxy_set_header X-Real-IP $remote_addr;

root/defaults/nginx/tinyauth-server.conf.sample

@@ -1,4 +1,4 @@
-## Version 2025/06/08 - Changelog: https://github.com/linuxserver/docker-swag/commits/master/root/defaults/nginx/tinyauth-server.conf.sample
+## Version 2026/07/18 - Changelog: https://github.com/linuxserver/docker-swag/commits/master/root/defaults/nginx/tinyauth-server.conf.sample
 # Make sure that your tinyauth container is in the same user defined bridge network and is named tinyauth
 # Rename /config/nginx/proxy-confs/tinyauth.subdomain.conf.sample to /config/nginx/proxy-confs/tinyauth.subdomain.conf
 
@@ -12,7 +12,7 @@ location /tinyauth {
     proxy_pass http://$upstream_tinyauth:3000/api/auth/nginx;
 
     proxy_set_header x-forwarded-proto $scheme;
-    proxy_set_header x-forwarded-host $http_host;
+    proxy_set_header x-forwarded-host $host$is_request_port$request_port;
     proxy_set_header x-forwarded-uri $request_uri;
 }
 
@@ -21,8 +21,8 @@ location @tinyauth_login {
     internal;
 
     ## Set the $target_url variable based on the original request
-    set_escape_uri $target_url $scheme://$http_host$request_uri;
-    
+    set_escape_uri $target_url $scheme://$host$is_request_port$request_port$request_uri;
+
     ## Set the $signin_url variable
     set $domain $host;
     if ($host ~* "^[^.]+\.([^.]+\..+)$") {