能否支持代理设置呢

群晖的Nas，尽管我在设置环境变量hubURL，还是没法更新最新的镜像，报错的内容就是"module/auth.go:192","content":"Failed to connect to https://index.docker.io/v2/: Get \"https://index.docker.io/v2/\": context deadline exceeded (Client.Timeout exceeded while awaiting headers)","level":"error"}