first commit

templates/Kernel/error.twig

@@ -0,0 +1,11 @@
+{% extends "@Kernel/layout.twig" %}
+
+{% block title %}{{ status }} – {{ site.title }}{% endblock %}
+
+{% block content %}
+<div class="error-page">
+    <h2 class="error-page__code">{{ status }}</h2>
+    <p class="error-page__message">{{ message }}</p>
+    <p><a href="/">← Retour à l'accueil</a></p>
+</div>
+{% endblock %}