Add templates for 404, 500

templates/500.html

@@ -0,0 +1,12 @@
+{% extends "bare_base.html" %}
+
+{% block title %}500 Server Error{% endblock %}
+
+{% block content %}
+<div class="m-4">
+<h1 class="text-4xl mt-4 font-bold">500 Server Error</h1>
+
+<div class="pt-2">
+    There was an internal server error.
+</div>
+{% endblock %}