Add X-Forwarded-Host header to nginx-proxy configuration

- Updated nginx-proxy.example.conf to include proxy_set_header for X-Forwarded-Host, enhancing header forwarding capabilities.

nginx-proxy.example.conf

@@ -21,6 +21,7 @@ server {
         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;
+        proxy_set_header X-Forwarded-Host $host;
         proxy_read_timeout 60s;
         proxy_connect_timeout 60s;
         proxy_send_timeout 60s;