windows玩docker的時候，經常碰到這種問題：
Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
Error response from daemon: Get https://registry-1.docker.io/v2/openstf/stf/manifests/latest: Get https://auth.docker.io/token?scope=repository%3Aopenstf%2Fstf%3Apull&service=registry.docker.io: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
原因是因為連線國內下Docker映象速度緩慢超時，很正常，歪果仁就是這麼的不友好
國內Dock Hub映象地址
DaoCloud 加速器
DaoCloud是國內第一家Dock Hub加速器提供商
網址：
https://dashboard.daocloud.io/mirror
註冊後進入：https://www.daocloud.io/mirror#accelerator-doc
配置重啟即可