Add health check

src/config/middleware.py

@@ -0,0 +1,19 @@
+"""This module sets up custom middleware."""
+
+# pylint: skip-file
+# TODO(Liam): Don't skip lint in this module.
+
+# TODO(Liam): Don't use deprecated `MiddlewareMixin`.
+# https://docs.djangoproject.com/en/5.1/topics/http/middleware/#writing-your-own-middleware
+
+from django.http import HttpResponse
+from django.utils.deprecation import MiddlewareMixin
+
+
+class HealthCheckMiddleware(MiddlewareMixin):
+    """This is the health check that we use in AWS to make sure the HCI is still alive
+    and well."""
+
+    def process_request(self, request):
+        if request.META["PATH_INFO"] == "/ping/":
+            return HttpResponse("pong")

src/config/settings.py

@@ -46,6 +46,7 @@
 ]
 
 MIDDLEWARE = [
+    "config.middleware.HealthCheckMiddleware",
     "django.middleware.security.SecurityMiddleware",
     "whitenoise.middleware.WhiteNoiseMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",