refactor

.env.example

@@ -2,15 +2,26 @@
 # Your primary domain (e.g., example.com). Used to derive ALLOWED_HOSTS, CORS, and CSRF settings.
 DOMAIN="localhost"
 
-# Set to a long, random string in production (e.g. 50+ chars)
+# Set to a long, random string in production (e.g. 50+ chars). REQUIRED in prod.
 SECRET_KEY="django-insecure-replace-this-in-production"
 
+# Which settings module to load. Use holy_backend.settings.dev locally,
+# holy_backend.settings.prod in production (Docker compose sets this).
+DJANGO_SETTINGS_MODULE=holy_backend.settings.dev
+
 # Set to "false" in production for security and performance
 DEBUG=true
 
 # Custom URL for the Django Admin interface (e.g., my-secret-admin/)
 ADMIN_URL="admin"
 
+# --- Celery / Redis ---
+# Broker and result backend for background jobs. Docker compose defaults to the bundled redis service.
+CELERY_BROKER_URL=redis://redis:6379/0
+CELERY_RESULT_BACKEND=redis://redis:6379/0
+# Run tasks synchronously (useful for local dev or CI). Unset in production.
+# CELERY_TASK_ALWAYS_EAGER=true
+
 # --- Advanced Networking (Optional, derived from DOMAIN if unset) ---
 # ALLOWED_HOSTS=example.com,another-domain.com
 # CSRF_TRUSTED_ORIGINS=https://example.com