FROM gcr.io/google-appengine/debian9@sha256:1d6a9a6d106bd795098f60f4abb7083626354fa6735e81743c7f8cfca11259f0
ENV dir /tmp/dir/
ONBUILD RUN echo "onbuild" > /tmp/onbuild
ONBUILD RUN  mkdir $dir
ONBUILD RUN echo "onbuild 2" > ${dir}/onbuild2
ONBUILD WORKDIR /new/workdir