docker cron

dockerfile

FROM ubuntu:latest AS base

RUN apt-get update && apt-get -y --no-install-recommends install \
    cron \
    && rm -rf /var/lib/apt/lists/*

FROM python:3.10.16-slim-bookworm AS prod
WORKDIR /app
COPY --from=base /usr/sbin/cron /usr/sbin/cron
COPY --from=base /usr/bin/crontab /usr/bin/crontab
COPY --chmod=755 init-cron.sh .
#/var/spool/cron
#RUN ["mkdir", "-p", "/var/spool/cron/crontabs"]
RUN ["/app/init-cron.sh"]
CMD ["/usr/sbin/cron"]

init-cron.sh

#!/bin/bash

/usr/sbin/cron | exit 0