https://blog.wongcw.com/2019/01/18/wordpress%e7%b5%82%e6%a5%b5%e5%84%aa%e5%8c%96%e6%8c%87%e5%8d%97-%e9%96%8b%e5%95%9f%e7%b6%b2%e9%a0%81gzip%e5%a3%93%e7%b8%ae/