FROM ubuntu:jammy

RUN apt-get -q update \
  && DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y \
    bind9 \
    isc-dhcp-server \
    openssh-server \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/{apt,dpkg,cache,log}

ENTRYPOINT [ "/dns.sh"  ]