Add X-Forwarded-Proto to nginx proxy

webserver/templates/locations/proxy.conf

@@ -27,6 +27,7 @@
         proxy_set_header Host {{server.server_name}};
         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;
         {% endif %}
         {% if location.proxy_headers is defined %}