Docker - 离线安装 docker-compose
（1）首先访问 docker-compose 的 GitHub 版本发布页面：
（2）由于服务器是 CentOS 系统，则下载 Linux 版本的 Compose：
（3）将下载下来的“docker-compose-Linux-x86_64”文件上传到服务器上，然后执行如下命令将其移动到 /usr/local/bin，并改名为“docker-compose”。
sudo mv docker-compose-Linux-x86_64 /usr/local/bin/docker-compose
（4）接着执行如下命令添加可执行权限：
sudo ``chmod` `+x /usr/local/bin/docker-compose
（5）最后使用 docker-compose -v 命令测试是否安装成功（如果提示“没有那个文件或目录”可以重启下服务器再试试）：
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!
