[Nextcloud] Fix headers

data/assets/nextcloud/nextcloud.conf

@@ -24,7 +24,8 @@ server {
   add_header X-Robots-Tag none;
   add_header X-Download-Options noopen;
   add_header X-Permitted-Cross-Domain-Policies none;
-  add_header X-Frame-Options "SAMEORIGIN";
+  #add_header X-Frame-Options "SAMEORIGIN";
+  add_header Referrer-Policy "no-referrer";
 
   server_name NC_SUBD;