Use a proper {% url %} tag for admin index

panorama/templates/panorama/base.html

@@ -46,7 +46,7 @@
             </ul>
             <ul class="nav navbar-right top-nav">
                 <li>
-                    <a href="/admin"><i class="fa fa-pencil-square-o"></i>  {% trans "Admin" %}</a>
+                    <a href="{% url 'admin:index' %}"><i class="fa fa-pencil-square-o"></i>  {% trans "Admin" %}</a>
                 </li>
                 <li class="dropdown langue">
                   <form action="{% url 'set_language' %}" method="post">{% csrf_token %}