Add text to encourage comments on blog post; invisible by default (#700)

Co-authored-by: Agriya Khetarpal <[email protected]>

Author: stefanv

assets/theme-css/posts.css

@@ -85,6 +85,10 @@
   margin-right: 1.25rem;
 }
 
+.post-please-comment {
+  display: none;
+}
+
 .read-more {
   font-style: italic;
 }

layouts/partials/posts/post.html

@@ -6,7 +6,9 @@ <h1>{{ .Title }}</h1>
     {{ if .Params.Subtitle }}
     <h5 class="subtitle">{{ .Params.Subtitle }}</h5>
     {{ end }}
-    <div class="post-meta">{{ partial "posts/meta.html" . }}</div>
+    <div class="post-meta">{{ partial "posts/meta.html" . }}
+      <span class="post-please-comment">🖊️ Please add your comments <a href="#discourse-comments">below!</a></span>
+    </div>
     <div class="post-content">
       {{ with $featuredImage }}
       {{ if .Params.showOnTop }}