Replace cron with supercronic

[colisee]

Changes

• Stop installing cron and use supercronic instead
• Remove output redirection in file lb-jobs-cron
• Use the same entrypoint for both application and cron roles
• Use a different container command to distinguish between application and cron roles
• Adapt examples

Close #183

[ikke-t]

very good, thanks.

[Copilot]

Pull request overview

This PR replaces the in-container cron-based job scheduling approach with supercronic, aiming to fix missing/redirected job logs and simplify container roles by using a single shared entrypoint.

Changes:

• Stop installing cron and switch scheduled job execution to supercronic.
• Remove stdout/stderr redirection from lb-jobs-cron job definitions.
• Update docker-compose examples to run the cron role via command: supercronic /config/lb-jobs-cron.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
setup.sh	Removes cron package installation from the image build.
lb-jobs-cron	Removes > /dev/stdout 2>&1 redirections from scheduled jobs.
bin/cron.sh	Deletes the dedicated cron entrypoint script.
Dockerfile	Adds a Go build stage intended to build/copy supercronic into the final image.
.examples/docker/docker-compose-public.yml	Updates job services to use supercronic via command: instead of cron.sh.
.examples/docker/docker-compose-local.yml	Updates the cron service to use supercronic via command: instead of cron.sh.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review. Take the survey.