ARG BASETAG=alpine
FROM postgres:$BASETAG

ARG GOCRONVER=v0.0.10
ARG TARGETOS
ARG TARGETARCH
RUN set -x \
	&& apk update && apk add ca-certificates curl \
	&& curl -L https://github.com/prodrigestivill/go-cron/releases/download/$GOCRONVER/go-cron-$TARGETOS-$TARGETARCH-static.gz | zcat > /usr/local/bin/go-cron \
	&& chmod a+x /usr/local/bin/go-cron

ENV SCHEDULE="@daily" HEALTHCHECK_PORT=8080

COPY backup.sh /backup.sh

VOLUME /backups

ENTRYPOINT ["/bin/sh", "-c"]
CMD ["exec /usr/local/bin/go-cron -s \"$SCHEDULE\" -p \"$HEALTHCHECK_PORT\" -- /backup.sh"]

HEALTHCHECK --interval=5m --timeout=3s \
  CMD curl -f "http://localhost:$HEALTHCHECK_PORT/" || exit 1