fix: LEAP-1456: CSRF - use $http_host instead of nginx $host so port will be included (#6344)

Author: jombooth

deploy/default.conf

@@ -184,7 +184,7 @@ http {
         send_timeout 90;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        proxy_set_header Host $host;
+        proxy_set_header Host $http_host;
         proxy_set_header X-Request-ID $request_id;
         proxy_pass_header Content-Type;
         proxy_redirect off;