Only add discourse link when configured

Author: jarrodmillman

layouts/partials/posts/post.html

@@ -1,7 +1,9 @@
 <section class="post content-padding">
   {{ with partial "_decorators/content-container.html" . }}
     <div class="post-meta">{{ partial "posts/meta.html" . }}
-      <span class="post-please-comment">🖊️ Please add your comments <a href="#discourse-comments">below!</a></span>
+      {{ with .Site.Params.comments.discourse_url }}
+        <span class="post-please-comment">🖊️ Please add your comments <a href="#discourse-comments">below!</a></span>
+      {{ end }}
     </div>
     {{- $featuredImage := .Resources.GetMatch "featuredImage" -}}
     <div class="post-content">