FROM alpine:3

ENTRYPOINT ["/docker-entrypoint.sh"]
CMD ["/usr/sbin/opendkim", "-A", "-f", "-x", "/etc/opendkim/opendkim.conf"]

COPY entrypoint.sh /docker-entrypoint.sh
COPY opendkim.conf /etc/opendkim/opendkim.conf

RUN apk --no-cache add opendkim