ARG FROM=ubuntu:focal
FROM ${FROM}

RUN apt-get update \
    && apt-get install -y --no-install-recommends ipcalc \
    && apt-get clean -y \
    && rm -rf \
        /var/cache/debconf/* \
        /var/lib/apt/lists/* \
        /var/log/* \
        /tmp/* \
        /var/tmp/*