Add whitenoise for static files

.gitignore

@@ -302,3 +302,5 @@ cython_debug/
 #.idea/
 
 # End of https://www.toptal.com/developers/gitignore/api/python,node
+
+/collected-static

requirements.txt

@@ -1,3 +1,4 @@
 Django==4.0.5
 wagtail==3.0
 django-environ==0.8.1
+whitenoise[brotli]==6.2.0

website/settings.py

@@ -41,17 +41,19 @@ INSTALLED_APPS = [
     "django.contrib.contenttypes",
     "django.contrib.sessions",
     "django.contrib.messages",
+    "whitenoise.runserver_nostatic",
     "django.contrib.staticfiles",
 ]
 
 MIDDLEWARE = [
-    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.security.SecurityMiddleware",
+    "django.middleware.clickjacking.XFrameOptionsMiddleware",
+    "whitenoise.middleware.WhiteNoiseMiddleware",
     "django.middleware.common.CommonMiddleware",
+    "django.contrib.sessions.middleware.SessionMiddleware",
     "django.middleware.csrf.CsrfViewMiddleware",
     "django.contrib.auth.middleware.AuthenticationMiddleware",
     "django.contrib.messages.middleware.MessageMiddleware",
-    "django.middleware.clickjacking.XFrameOptionsMiddleware",
-    "django.middleware.security.SecurityMiddleware",
     "wagtail.contrib.redirects.middleware.RedirectMiddleware",
 ]
 
@@ -108,10 +110,7 @@ STATICFILES_DIRS = [
     os.path.join(BASE_DIR, "static"),
 ]
 
-# ManifestStaticFilesStorage is recommended in production, to prevent outdated
-# JavaScript / CSS assets being served from cache (e.g. after a Wagtail upgrade).
-# See https://docs.djangoproject.com/en/4.0/ref/contrib/staticfiles/#manifeststaticfilesstorage
-STATICFILES_STORAGE = "django.contrib.staticfiles.storage.ManifestStaticFilesStorage"
+STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"
 
 STATIC_ROOT = os.path.join(BASE_DIR, "collected-static")
 STATIC_URL = "/static/"