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FROM alpine AS mirror
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RUN mkdir -p /out/etc/apk && cp -r /etc/apk/* /out/etc/apk/
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RUN apk add --no-cache --initdb -p /out \
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dosfstools \
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syslinux \
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grub-bios grub-efi
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RUN rm -rf /out/etc/apk /out/lib/apk /out/var/cache
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FROM scratch
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COPY --from=mirror /out/ /
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