Prioritize OS environment variables over .env file to improve Docker compatibility for the server

lightrag/api/lightrag_server.py

@@ -49,7 +49,7 @@ from .auth import auth_handler
 # Load environment variables
 # Updated to use the .env that is inside the current folder
 # This update allows the user to put a different.env file for each lightrag folder
-load_dotenv(".env", override=True)
+load_dotenv()
 
 # Initialize config parser
 config = configparser.ConfigParser()