add flex grow to every page's main content

scipost_django/scipost/templates/scipost/base.html

@@ -2,7 +2,7 @@
 
 {% block base %}
 
-  <main class="{% block container_class %}container {% endblock %}">
+  <main class="{% block container_class %}container flex-grow-1 {% endblock %}">
     {% block page_header %}{% endblock page_header %}
 
     {% block content %}{% endblock content %}