add error pages

hub/services/views/errors.py

@@ -0,0 +1,16 @@
+from django.shortcuts import render
+
+
+def bad_request(request, exception):
+    """400 error handler"""
+    return render(request, "400.html", status=400)
+
+
+def page_not_found(request, exception):
+    """404 error handler"""
+    return render(request, "404.html", status=404)
+
+
+def server_error(request):
+    """500 error handler"""
+    return render(request, "500.html", status=500)