enabled redis alongside celery, but waiting on true caching functionality—flash messages will behave better w. cache_page after they rely on htmx library, not current full-page reload

src/core/settings.py

@@ -109,8 +109,17 @@ else:
         }
     }
 
-# Celery
+# Celery & Redis
 CELERY_BROKER_URL = os.environ.get('CELERY_BROKER_URL', 'redis://localhost:6379/0')
+REDIS_URL = os.environ.get('REDIS_URL')
+if REDIS_URL:
+    CACHES = {
+        'default': {
+            'BACKEND': 'django.core.cache.backends.redis.RedisCache',
+            'LOCATION': REDIS_URL,
+        }
+    }
+    SESSION_ENGINE = 'django.contrib.sessions.backends.cached_db'
 
 # Password validation
 # https://docs.djangoproject.com/en/6.0/ref/settings/#auth-password-validators