FROM alpine:latest

RUN adduser -u 5000 -g vmail -s /usr/bin/nologin -h /home/vmail -S vmail
RUN apk add --no-cache postfix ca-certificates

ADD ./main.cf /etc/postfix/main.cf
ADD ./master.cf /etc/postfix/master.cf

ADD ./start.sh /start.sh

ENTRYPOINT ["/start.sh"]