FROM ubuntu:24.04
RUN apt-get update \
    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends bind9 \
    && rm -rf /var/lib/apt/lists/* \
    && mkdir -p /run/named /var/cache/bind \
    && chown -R bind:bind /run/named /var/cache/bind
COPY named.conf /etc/bind/named.conf
COPY db.example.test /var/cache/bind/db.example.test
RUN chown bind:bind /etc/bind/named.conf /var/cache/bind/db.example.test \
    && chmod 644 /etc/bind/named.conf \
    && chmod 664 /var/cache/bind/db.example.test
EXPOSE 53/tcp 53/udp
CMD ["/usr/sbin/named", "-f", "-g", "-u", "bind", "-c", "/etc/bind/named.conf"]