Usage: docker build [OPTIONS] PATH | URL | - [flags]
Options: -t, --tag list # 镜像名称
-f, --file string # 指定Dockerfile文件位置
# docker build .
# docker build -t shykes/myapp .
# docker build -t shykes/myapp -f /path/Dockerfile /path
# docker build -t shykes/myapp http://www.example.com/Dockerfile
