added topic listing

cao_blogr/templates/user_add.jinja2

@@ -2,6 +2,7 @@
 
 {% block content %}
 
+<div class="container">
     <form action="{{request.route_url('user_add', name=name)}}" method="post" class="form">
 
         {% for error in form.username.errors %}
@@ -30,5 +31,6 @@
 
 
     </form>
+</div>
 
 {% endblock %}