Add logger & implement fiber error handling

views/error_page.html

@@ -0,0 +1,8 @@
+{% extends "layouts/main.html" %}
+
+{% block main %}
+<div class="container text-center py-5">
+	<div class="h1 mb-3">Erreur {{ Code }}</div>
+	<code>{{ Message }}</code>
+</div>
+{% endblock %}