read from config

app.py

@@ -33,7 +33,7 @@ else:
     app.config.from_object(DevelopmentConfig)
 
 # Check for Redis availability and configure cache
-redis_url = app.config.get("REDIS_URL", "redis://localhost:6379/0")
+redis_url = app.config["REDIS_URL"]
 cache_config = {"CACHE_TYPE": "redis", "CACHE_REDIS_URL": redis_url}
 try:
     # Use a short timeout to prevent hanging