FROM alpine RUN apk add --update openssh COPY sshd_config /etc/ssh/sshd_jumpuser_config RUN echo "Include /etc/ssh/sshd_jumpuser_config" >> /etc/ssh/sshd_config RUN adduser -D -s /bin/sh -H jumpuser RUN passwd -u -d jumpuser EXPOSE 2222 COPY entrypoint.sh /usr/local/bin/entrypoint.sh RUN chmod +x /usr/local/bin/entrypoint.sh ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]