gnu-social/docker/mail/Dockerfile

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FROM debian:buster-slim
ENV DEBIAN_FRONTEND=noninteractive
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# Install packages
RUN \
apt-get update \
&& apt-get upgrade -y \
&& apt-get install -y --no-install-recommends \
dovecot-core \
dovecot-imapd \
dovecot-lmtpd \
dovecot-pop3d \
opendkim \
opendkim-tools \
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openssl \
postfix \
procps \
rsyslog \
s6 \
&& apt-get autoclean \
&& apt-get autoremove
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# Setup folders and users
RUN \
groupadd -g 2222 vmail \
&& mkdir -p -m 751 "/var/mail/" \
&& mkdir -p -m 755 "/etc/mail/" \
&& useradd -d "/var/mail" -M -s "/usr/sbin/nologin" -u 2222 -g 2222 vmail \
&& usermod -aG vmail postfix \
&& usermod -aG vmail dovecot \
&& usermod -aG vmail opendkim\
&& chown vmail:vmail "/var/mail"
# Copy config files
COPY rootfs/ /
RUN \
chmod +x "/etc/service/postfix/run" \
&& chmod +x "/etc/service/dovecot/run" \
&& chmod +x "/etc/service/opendkim/run" \
&& chmod +x "/etc/service/rsyslog/run"
# Prepare user
RUN mkdir -p "/var/mail/${DOMAINNAME}" \
&& mkdir -p "/var/mail/${DOMAINPART}/${USER%@*}" \
&& chown vmail:vmail "/var/mail/${DOMAINNAME}" \
&& chown vmail:vmail "/var/mail/${DOMAINPART}/${USER%@*}"
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# Expose ports
EXPOSE 25 110 143 587 993 995
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# Run start script
ENTRYPOINT /usr/bin/start.sh