feat: add error pages

templates/bundles/TwigBundle/Exception/error404.html.twig

@@ -0,0 +1,12 @@
+{% extends 'base.html.twig' %}
+
+{% block body %}
+    <p>
+        <div class="container">
+            <div style="text-align: center;">
+                <h1>{{ "page not found" | trans }}</h1>
+                <a href="{{ path('homepage') }}">{{ "return to the homepage" | trans }}</a>
+            </div>
+        </div>
+    </p>
+{% endblock %}

templates/bundles/TwigBundle/Exception/error500.html.twig

@@ -0,0 +1,13 @@
+{% extends 'base.html.twig' %}
+
+{% block body %}
+    <p>
+    <div class="container">
+        <div style="text-align: center;">
+            <h1>{{ "internal server error" | trans }}</h1>
+            {{ "our developers are doing their best to fix it. please try again later." | trans }}
+            <a href="{{ path('homepage') }}">{{ "return to the homepage" | trans }}</a>
+        </div>
+    </div>
+    </p>
+{% endblock %}