fix(config): added Redis host and port configuration

backend/config.py

@@ -61,3 +61,7 @@ FRONTEND_URL = os.getenv("FRONTEND_URL", "https://radionica3d.me")
 
 # Telegram Notifications
 TELEGRAM_CHAT_ID = os.getenv("CHAT_ID")
+
+# Redis Configuration
+REDIS_HOST = os.getenv("REDIS_HOST", "localhost")
+REDIS_PORT = int(os.getenv("REDIS_PORT", "6379"))