feat: add support for X-Forwarded-Port in ProxyFix middleware (#13102)

docker/nginx/proxy.conf.template

@@ -3,6 +3,7 @@
 proxy_set_header Host $host;
 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 proxy_set_header X-Forwarded-Proto $scheme;
+proxy_set_header X-Forwarded-Port $server_port;
 proxy_http_version 1.1;
 proxy_set_header Connection "";
 proxy_buffering off;