https://blog.wongcw.com/2019/10/05/edge-canary%e5%bc%95%e5%85%a5%e5%8f%af%e6%98%8e%e6%96%87%e9%a1%af%e7%a4%ba%e5%af%86%e7%a2%bc%e7%9a%84%e9%81%b8%e9%a0%85/