cube-studio/myapp/templates/index.html

{% extends "appbuilder/base.html" %}
{% block content %}
<div class="jumbotron">
  <div class="container">
    <h1>{{_("My App on F.A.B.")}}</h1>
    <p>{{_("My first app using F.A.B, bla, bla, bla")}}</p>
  </div>
</div>
{% endblock %}