app/views/templates/maintenance.html.twig

{% extends 'base.html.twig' %}

{% block header %}
  <header><h1 class="fw-semibold">{{ page_title  }}</h1></header>
{% endblock %}

{% block main %}
<div class="mt-5 d-flex flex-row w-50 alert p-0 alert-light mx-auto justify-content-center text-center" role="alert">
    <div class="font-monospace bg-primary-subtle flex-fill p-0 fw-semi-bold fs-3 text-dark">503</div>
    <div class=" flex-fill p-2 align-self-center ">{{ page_content }}</div>
</div>
{% endblock %}

{% block footer %}
  <footer></footer>
{% endblock %}