Predefined ARGS(预先定义好的ARG变量)
--build-arg <varname>=<value>FROM ubuntu
RUN echo "Hello World"FROM ubuntu
ARG HTTP_PROXY
RUN echo "Hello World"PreviousUsing ARG Variables(使用ARG变量)NextAutomatic platform ARGs in the global scope(全局作用域中自动化平台的ARGS)
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