FROM debian:bookworm-slim RUN set -eux; \ apt-get update; \ DEBIAN_FRONTEND=noninteractive apt-get upgrade -y; \ DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \ openssh-server \ curl \ telnet \ net-tools \ screen \ ; \ rm -rf /var/lib/apt/lists/* \ rm /etc/ssh/ssh_host_*key* ADD start.sh / EXPOSE 22/tcp CMD /start.sh HEALTHCHECK CMD netstat -tnlp | grep '0.0.0.0:22' || exit 1