[Enhancement] add error 500 page

Squest/urls.py

@@ -17,6 +17,7 @@
 from django.contrib import admin
 from django.shortcuts import redirect
 from django.urls import path, include
+from django.views.generic import TemplateView
 from drf_yasg.views import get_schema_view
 from drf_yasg import openapi
 from rest_framework import permissions
@@ -69,3 +70,10 @@
     urlpatterns += [
         path('metrics/', include('monitoring.urls')),
     ]
+
+if settings.DEBUG:
+    urlpatterns += [
+        path("403.html", TemplateView.as_view(template_name="403.html"), name="403-test"),
+        path("404.html", TemplateView.as_view(template_name="404.html"), name="404-test"),
+        path("500.html", TemplateView.as_view(template_name="500.html"), name="500-test")
+    ]

templates/500.html

@@ -0,0 +1,18 @@
+{% extends "base.html" %}
+
+{% block content %}
+    <div class="content-wrapper">
+        <div class="content-header">
+        </div>
+        <section class="content">
+            <div class="error-page align-content-center">
+                <h2 class="headline text-danger text-center">500</h2>
+                <div class="error-content align-content-center">
+                    <h3><i class="fas fa-exclamation-triangle text-danger"></i>Oops! Something went wrong.</h3>
+                    <p>We will work on fixing that right away. Meanwhile, you may return to <a href={% url 'home' %}">homepage</a></p>
+                </div>
+            </div>
+        </section>
+    </div>
+
+{% endblock %}