Update app2.py

app2.py

@@ -20,10 +20,10 @@ load_dotenv()  # Load environment variables from .env file
 
 class Settings(BaseSettings):
     # Define the database fields explicitly
-    db_host: str
-    db_user: str
-    db_password: str
-    db_name: str
+    DB_HOST: str
+    DB_USER: str
+    DB_PASSWORD: str
+    DB_NAME: str
     database_type: str
     database_port: int
     chatbot_api_key: str