update article header

homepage/theme/templates/article.html

@@ -11,6 +11,11 @@
 {% block content %}
   <main class="w-100 mt5-ns gray">
     <div class="mw7 center pb5 bg-white">
+      <div class="dib gray bg-white ph3 ph5-ns pt4">
+        <p class="f4 ma0 mb4">
+          Offen is a fair, open and self hosted web analytics tool that treats operators and users as equal parties.
+        </p>
+      </div>
       <figure class="ma0">
         <img alt="{{ title }}" src="{{ image_url }}"/>
         {% if article.image_caption %}