Dockerfile.cron

FROM debian:buster-slim

# Add crontab file in the cron directory
ADD crontab /etc/cron.d/prune-old-files

# Give execution rights on the cron job
RUN chmod 0644 /etc/cron.d/prune-old-files

# Create the log file to be able to run tail
RUN touch /var/log/cron.log

#Install Cron
RUN apt-get update
RUN apt-get -y install cron

# Run the command on container startup
CMD cron && tail -f /var/log/cron.log