Add canonical URL and noindex when using full page redirection

layouts/partials/head.html

@@ -5,5 +5,7 @@
 {{- if not $url }}
 {{- errorf "missing, empty or null value at 'values.redirect.url': %s" .Position }}
 {{- end }}
+<link rel="canonical" href="{{ $url }}">
+<meta name="robots" content="noindex">
 <meta http-equiv="refresh" content="{{ $delay }}; url={{ $url }}">
 {{- end }}