Add _includes/after-content.html and remove docs site default layout override

_layouts/default.html

@@ -15,6 +15,7 @@
 
     <div class="initial-content">
       {{ content }}
+      {% include after-content.html %}
     </div>
 
     {% if site.search == true %}
@@ -31,6 +32,5 @@
     </div>
 
     {% include scripts.html %}
-
   </body>
 </html>