# syntax=docker/dockerfile:1
FROM alpine:latest
# install apt packages
ENV TZ Europe/Berlin 
RUN apk add --no-cache postfix spamassassin rsyslog logrotate xz
# install s6 process manager
ADD https://github.com/just-containers/s6-overlay/releases/download/v3.1.1.2/s6-overlay-noarch.tar.xz /tmp
ADD https://github.com/just-containers/s6-overlay/releases/download/v3.1.1.2/s6-overlay-x86_64.tar.xz /tmp
RUN <<EOF 
tar -C / -Jxpf /tmp/s6-overlay-noarch.tar.xz
tar -C / -Jxpf /tmp/s6-overlay-x86_64.tar.xz
EOF
COPY ./etc/s6-overlay /etc/s6-overlay
# install kopano core
WORKDIR /root
EXPOSE 25
VOLUME /var/spool/postfix
# HEALTHCHECK --start-period=350s CMD echo QUIT|nc localhost 25|grep "220 .* ESMTP Postfix"
ENTRYPOINT ["/init"]