FROM gcr.io/google-appengine/debian9@sha256:1d6a9a6d106bd795098f60f4abb7083626354fa6735e81743c7f8cfca11259f0 VOLUME /foo1 RUN echo "hello" > /foo1/hello WORKDIR /foo1/bar ADD context/foo /foo1/foo COPY context/foo /foo1/foo2 RUN mkdir /bar1 VOLUME /foo2 VOLUME /foo3 RUN echo "bar2" VOLUME /foo4 RUN mkdir /bar3 VOLUME /foo5