Initial commit

tests/integration/targets/docker_image/files/Dockerfile

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+FROM busybox
+ENV foo /bar
+WORKDIR ${foo}

tests/integration/targets/docker_image/files/EtcHostsDockerfile

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+FROM busybox
+# This should fail building if docker cannot resolve some-custom-host
+RUN ping -c1 some-custom-host

tests/integration/targets/docker_image/files/MyDockerfile

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+FROM alpine:3.7
+ENV INSTALL_PATH /newdata
+RUN mkdir -p $INSTALL_PATH
+
+WORKDIR $INSTALL_PATH

tests/integration/targets/docker_image/files/StagedDockerfile

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+FROM busybox AS first
+ENV dir /first
+WORKDIR ${dir}
+
+FROM busybox AS second
+ENV dir /second
+WORKDIR ${dir}