Add <a> tag to image

layouts/_default/li.html

@@ -8,8 +8,8 @@
       </time>
     </p>
   </header>
-  {{ with .Params.image }}
-    <img src="{{ . }}" alt="thumbnail" class="c-article__thumbnail">
+  {{ if .Params.image }}
+    <a href="{{ .Permalink }}"><img src="{{ .Params.image }}" alt="thumbnail" class="c-article__thumbnail"></a>
   {{ end }}
   <div class="c-article__summary">
     {{ .Summary | plainify | safeHTML }}
@@ -17,4 +17,4 @@
   {{ if .Truncated }}
   <a href="{{ .Permalink }}" class="c-article__btn p-list-article__btn">Read more</a></li>
   {{ end }}
-</article>
+</article>