docker build -f /path/to/a/Dockerfile -t shykes/myapp:1.0.2 -t shykes/myapp:latest .   可以指定 Dockerfile 文件位置以及可以增加多个 tag
# this is a Comment FROM <image>@<digest>   MAINTAINER <name>   用来标识 Image 的维护者
# 默认使用 /bin/sh -c 运行 RUN <command>  # 可以使用 / 换行 RUN /bin/bash -c 'source $HOME/.bashrc ;/   echo $HOME'  RUN ["executable", "param1", "param2"]  # exec 模式,下面的 $HOME 不会被正确替换 RUN [ "echo", "$HOME" ]  # 使用这种方式 RUN [ "sh", "-c", "echo", "$HOME" ]   # 共有三种模式 CMD ["executable","param1","param2"]  CMD ["param1","param2"]  CMD command param1 param2 LABEL "com.example.vendor"="ACME Incorporated"   LABEL com.example.label-with-value="foo"   LABEL version="1.0"   LABEL description="This text illustrates /   that label-values can span multiple lines."   LABEL multi.label1="value1" multi.label2="value2" other="value3"   LABEL multi.label1="value1" /         multi.label2="value2" /       other="value3" EXPOSE <port> [<port>...]   ENV myName John Doe   ENV myDog Rex The Dog   ENV myCat fluffy   # 有两种用法 ADD <src>... <dest>   ADD ["<src>",... "<dest>"]   ENTRYPOINT ["executable", "param1", "param2"]   ENTRYPOINT command param1 param2   ENTRYPOINT VS CMD
  
 
VOLUME ["/data"]   USER daemon   # WORKDIR /path/to/workdir WORKDIR /a   WORKDIR b   WORKDIR c   RUN pwd   # path is /a/b/c ARG <name>[=<default value>]  FROM busybox   ARG user1   ARG buildno=1