pull镜像失败：
error pulling image configuration: download failed after attempts=6: dial tcp 31.13.69.245:443: connect: connection refused
设置腾讯云镜像：
1、创建/etc/docker目录
sudo mkdir -p /etc/docker
2、创建docker镜像配置文件
sudo tee /etc/docker/ <<-'EOF'
{
"registry-mirrors": [
"",
"",
".",
""
]
}
EOF
3、重启
sudo systemctl daemon-reload
sudo systemctl restart docker
或者
sudo service docker restart