docker info --format '{{ .SecurityOptions }}'
[name=seccomp,profile=unconfined name=cgroupns]

{
  "daemon": {
    "registry-mirrors": [
      "https://registry.docker-cn.com",
      "https://mirror.ccs.tencentyun.com",
      "https://docker.mirrors.ustc.edu.cn"
    ]
  }
}