Create Dockerfile

rootfs/Dockerfile

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+FROM almalinux AS system-build
+
+RUN mkdir -p /mnt/sys-root; \
+    dnf install --installroot /mnt/sys-root --releasever 8 --setopt install_weak_deps=false --nodocs -y \
+    bash \
+    binutils \
+    coreutils \
+    coreutils-common \
+    crypto-policies-scripts \
+    dbus-glib \
+    diffutils \
+    dmidecode \
+    dnf-plugins-core \
+    elfutils-debuginfod-client \
+    file \
+    findutils \
+    glibc-minimal-langpack \
+    gzip \
+    hwdata \
+    iptables-libs \
+    iputils \
+    jq \
+    langpacks-en \
+    less \
+    libibverbs \
+    libmetalink \
+    libmetalink \
+    libnl3 \
+    libpcap \
+    libuser \
+    nano \    
+    ncurses \
+    openssl \
+    openssl-pkcs11 \
+    passwd \
+    pciutils \
+    pciutils \
+    pciutils-libs \
+    platform-python-pip \
+    procps-ng \ 
+    python3-dateutil \
+    python3-dbus \
+    python3-dnf-plugins-core \
+    python3-six \
+    python3-unbound \
+    rdma-core \
+    rootfiles \
+    rpm-plugin-systemd-inhibit \
+    sudo \
+    systemd \
+    tar \
+    tmux \
+    unbound-libs \
+    usermode \
+    vim-minimal \
+    virt-what \
+    which \
+    xz \
+    yum \
+    yum-utils \
+    ; \
+    dnf --installroot /mnt/sys-root clean all; \
+    rm -rf /mnt/sys-root/var/cache/* /mnt/sys-root/var/log/dnf* /mnt/sys-root/var/log/yum.*; \
+    # cp /etc/yum.repos.d/*.repo /mnt/sys-root/etc/yum.repos.d/; \
+    # generate build time file for compatibility with CentOS
+    /bin/date +%Y%m%d_%H%M > /mnt/sys-root/etc/BUILDTIME; \
+    echo '%_install_langs C.utf8' > /mnt/sys-root//etc/rpm/macros.image-language-conf; \
+    echo 'LANG="C.utf8"' >  /mnt/sys-root/etc/locale.conf; \
+    echo 'container' > /mnt/sys-root/etc/dnf/vars/infra; \
+    rm -f /mnt/sys-root/etc/machine-id; \
+    touch /mnt/sys-root/etc/machine-id;
+
+
+FROM scratch
+
+COPY --from=system-build /mnt/sys-root/ /
+
+ENV LANG=C.utf8
+
+RUN systemctl set-default multi-user.target; \
+    systemctl mask systemd-remount-fs.service \
+    dev-hugepages.mount \
+    sys-fs-fuse-connections.mount \
+    systemd-logind.service \
+    getty.target \
+    console-getty.service \
+    systemd-udev-trigger.service \
+    systemd-udevd.service \
+    systemd-random-seed.service \
+    systemd-machine-id-commit.service
+
+CMD ["/sbin/init"]
+
+STOPSIGNAL SIGRTMIN+3