FROM linuxkit/alpine:5ce235f4fb55772e7f78871a70bfe26f774fe2b0 AS mirror
RUN mkdir -p /out/etc/apk && cp -r /etc/apk/* /out/etc/apk/
RUN apk add --no-cache --initdb -p /out \
    alpine-baselayout \
    busybox \
    dosfstools \
    libarchive-tools \
    sfdisk \
    syslinux \
    && true
RUN mv /out/etc/apk/repositories.upstream /out/etc/apk/repositories

FROM scratch
WORKDIR /
COPY --from=mirror /out/ /
COPY . .
ENTRYPOINT [ "/make-bios" ]