do not nest containers

templates/base.html

@@ -3,12 +3,11 @@
 
 {% block title %}Prolefeeder{% endblock %}
 {% block content %}
-<div class="container">
 
 {{ utils.flashed_messages() }}
 
-{% block app_content %}
+<div class="container">
-{% endblock %}
+{% block app_content %}{% endblock %}
-
 </div>
+
 {% endblock %}