用来进行环境初始化（其中包括 mysql nginx mongodb redis nacos kafka zookeeper）的安装步骤，此篇主要是docker化安装
为了加快软件的安装，需要修改apt配置，使用国内源
这边使用阿里，也可以使用清华、中科大等
备份原来的源：
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
更换源:
sudo rm /etc/apt/sources.list
sudo vim /etc/apt/sources.list
将以下内容复制进去，保存
#deb包
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
##测试版源
deb http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse
#源码
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
#测试版源
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse
执行更新
sudo apt-get update
此时可以看到已经是使用阿里的镜像源