Add SEO metadata partial and bump Hugo version to 0.53 (#508)

Signed-off-by: lucperkins <lucperkins@gmail.com>

website/layouts/partials/docs/header.html

@@ -1,11 +1,11 @@
-{{- $description := .Params.description }}
+{{ $description := .Params.description }}
 <section class="dashboard-main-header section has-background-dark">
   <p class="title is-size-1 has-text-white-bis has-text-weight-light{{ if $description }} is-spaced{{ end }}">
     {{ .Title }}
   </p>
-  {{- with $description }}
+  {{ with $description }}
   <p class="subtitle is-size-3 is-size-4-mobile has-text-white-bis has-text-weight-light">
     {{ . }}
   </p>
-  {{- end }}
+  {{ end }}
 </section>