ARG DEBIAN_VERSION=20210408
FROM docker.io/debian:bullseye-${DEBIAN_VERSION}-slim

ENV container=docker
ENV LC_ALL=C
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get -y update && apt-get -y install \
    tini \
    dovecot-core \
    dovecot-imapd \
    dovecot-lmtpd \
    dovecot-ldap \
    dovecot-managesieved \
    dovecot-mysql \
    dovecot-pgsql \
    dovecot-sqlite \
    dovecot-pop3d \
    dovecot-sieve \
    dovecot-solr \
    dovecot-submissiond \
    ca-certificates \
    ssl-cert \
    && rm -rf /etc/dovecot \
    && mkdir /srv/mail && chown dovecot:dovecot /srv/mail \
    && rm -rf /var/lib/apt/lists/*

VOLUME [/etc/dovecot /srv/mail /var/mail]
ENTRYPOINT ["/sbin/tini" "--"]
CMD ["/usr/sbin/dovecot" "-F"]