FROM public.ecr.aws/docker/library/ubuntu:20.04

RUN apt-get update \
    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
        systemd \
        systemd-sysv \
        openssh-client \
        openssh-server \
        iproute2 \
        iptables \
        socat \
        curl \
        ca-certificates \
    && systemctl enable ssh \
    && rm -rf /var/lib/apt/lists/*

ENV container=docker
STOPSIGNAL SIGRTMIN+3
CMD ["/sbin/init"]