# syntax=docker.io/docker/dockerfile:1.5.2
FROM ubuntu:20.04
# install apt packages
ENV TZ Europe/Berlin 
RUN <<EOF
apt-get update
apt-get install -y postfix
# cleanup
apt-get autoclean
rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* ~/.cache ~/.npm
echo zntrl.de >>/etc/mailname
EOF
COPY etc/postfix/ /etc/postfix/
COPY --chmod=0775 entrypoint.sh /entrypoint.sh
EXPOSE 25
VOLUME /var/spool/postfix
ENTRYPOINT ["/entrypoint.sh"]
CMD ["postfix", "start-fg"]