Dokcer容器内执行apt-get update慢的问题

阿里云官方镜像站: https://developer.aliyun.com/mirror/

1. 查看镜像debian版本：

   cat /etc/debian_version

2：清空/etc/apt/sources.list文件

echo > /etc/apt/sources.list

3：查看/etc/apt/sources.list内容

cat /etc/apt/sources.list

4：向/etc/apt/sources.list文件写入阿里云镜像地址，具体地址查看阿里云镜像站，根据debian版本确定镜像地址

cat >> /etc/apt/sources.list <<EOF
deb http://mirrors.aliyun.com/debian/ stretch main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ stretch main non-free contrib
deb http://mirrors.aliyun.com/debian-security stretch/updates main
deb-src http://mirrors.aliyun.com/debian-security stretch/updates main
deb http://mirrors.aliyun.com/debian/ stretch-updates main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ stretch-updates main non-free contrib
deb http://mirrors.aliyun.com/debian/ stretch-backports main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ stretch-backports main non-free contrib
EOF