### 環境
CentOS Linux release 7.5
### 安裝
一鍵安裝命令：
`curl -sSL https://get.daocloud.io/docker | sh`
### 啟動
`systemctl start docker`
### 測試
`docker run hello-world`
通過`docker images`查看是否安裝成功
https://www.runoob.com/docker/docker-install-php.html
