https://younghwani.github.io/posts/%EC%95%84%EC%9D%B4%ED%85%9C24-%EB%A9%A4%EB%B2%84-%ED%81%B4%EB%9E%98%EC%8A%A4%EB%8A%94-%EB%90%98%EB%8F%84%EB%A1%9D-static%EC%9C%BC%EB%A1%9C-%EB%A7%8C%EB%93%A4%EB%9D%BC/