Fix a typo.

RUN wget -q $URL && \

    echo "$SHA1SUM  supercronic-linux-amd64" > sha1.sum && \

    sha1sum -c sha1.sum && \

    install -m 755 supercronic-linux-amd64 /usr/local/bin/supersonic && \

    install -m 755 supercronic-linux-amd64 /usr/local/bin/supercronic && \

    touch /crontab

FROM alpine:3.16

COPY --from=downloader /usr/local/bin/supersonic /usr/local/bin/supersonic

COPY --from=downloader /usr/local/bin/supercronic /usr/local/bin/supercronic

COPY --from=downloader /crontab /crontab

WORKDIR /tmp

USER nobody

CMD [ "supersonic", "/crontab" ]

HEALTHCHECK CMD pgrep supersonic

RUN supersonic -test /crontab

CMD [ "supercronic", "/crontab" ]

HEALTHCHECK CMD pgrep supercronic

RUN supercronic -test /crontab

ONBUILD COPY crontab /crontab

ONBUILD RUN supersonic -test /crontab

ONBUILD RUN supercronic -test /crontab

# Cron docker

A Docker image for running a Cron daemon, actually running

[Supersonic](https://github.com/aptible/supercronic).

[Supercronic](https://github.com/aptible/supercronic).

## Usage

There are possible usage patterns for this image. The first is using it in a

multi-stage image build as the source of the `supersonic` binary to incorporate

multi-stage image build as the source of the `supercronic` binary to incorporate

in your own image like so:

```

FROM registry.shore.co.il/cron as supersonic

FROM registry.shore.co.il/cron as supercronic

FROM alpine:latest

COPY --from=supersonic /usr/local/bin/supersonic /usr/local/bin/

COPY --from=supercronic /usr/local/bin/supercronic /usr/local/bin/

```

The other pattern is building on top of this image to run some periodic tasks.