Improve404 (#147) * improve handling of error pages the current version can handle files missing, but it can not handle directories missing. https://docs.stakater.com/mto/main/reference-guides/admin-clusterrole.html Fails to show a nice looking 404. https://docs.stakater.com/mto/main/obviously_missing_file succeeds. With this change, both should work. Not sure what internal does or if is needed, have tested on a local nginx only. * needed for 403 I realized try_files failed to handle 403, so this repairs that part * remove duplicate field