contentthumbnail(bool) now supported in feed posts

main-site/themes/temper/layouts/_default/single.html

@@ -7,9 +7,11 @@
   </div>
   {{ end }}
   {{  if .Params.Thumbnail }}
-    <a href="{{ .Params.Thumbnail }}">
-      <img class="card-img" src="{{ .Params.Thumbnail }}">
-    </a>
+    {{ if .Params.ContentThumbnail }}
+      <a href="{{ .Params.Thumbnail }}">
+        <img class="card-img" src="{{ .Params.Thumbnail }}">
+      </a>
+    {{ end }}
   {{ end }}
   <div class="container">{{ .Content }}</div>
 {{ end }}