FROM alpine:3

RUN apk -v --update add \
        bash \
        python \
        py-pip \
        groff \
        less \
        mailcap \
        jq \
        wget \
        && \
    pip install --upgrade awscli==1.14.5 s3cmd==2.0.1 python-magic && \
    apk -v --purge del py-pip && \
    rm /var/cache/apk/*

COPY ./update-dns.sh /usr/local/bin/
RUN chmod +x /usr/local/bin/update-dns.sh

RUN mkdir -p /etc/cron.d/
RUN echo -e "*/10 * * * * /bin/bash update-dns.sh >> /var/log/cron.log 2>&1" > /etc/cron.d/dns-cron
RUN crontab /etc/cron.d/dns-cron
RUN touch /var/log/cron.log

CMD crond && tail -f /var/log/cron.log