Use {{ site.url }} instead of page.base_url.

docs/getting-started.html

@@ -1,8 +1,3 @@
----
-layout: default
-title: Getting Started
-base_url: "../"
----
       <div class="row">
         <div class="col-md-12">
           <div class="page-header">
@@ -39,7 +34,7 @@ base_url: "../"
               <li>located in <i>$ISE_EIFFEL/contrib/examples/web/ewf</i></li>
               <li><a href="https://github.com/EiffelWebFramework/ewf_examples">available on Github</a></li>
             </ul>
-            <li>Read the <a href="{{ page.base_url }}workbook/workbook">Overview</a></li>
+            <li>Read the <a href="{{ site.url }}/workbook/readme">Overview</a></li>
           </ul>
         </div>
       </div>