Add Cron container for backing up the slapd data.

*

!crontab

FROM docker:19.03 as docker

# hadolint ignore=DL3006

FROM adarnimrod/cron as supersonic

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

COPY --chown=root:root crontab /crontab

# hadolint ignore=DL3002

USER root

# crond

> Cron container image.

## Description

This container periodically runs the slapd backup script. The script runs in the

slapd container so the `dockerd` socket is bind mounted to this container and

the commands are executed via `docker exec` in the other containers. Thus,

outside of the context of this setup this container doesn't make much sense.

## License

This software is licensed under the MIT license (see `LICENSE.txt`).

## Author Information

Nimrod Adar, [contact me](mailto:nimrod@shore.co.il) or visit my [website](

https://www.shore.co.il/). Patches are welcome via [`git send-email`](

http://git-scm.com/book/en/v2/Git-Commands-Email). The repository is located

at: <https://www.shore.co.il/git/>.

@daily docker exec ldap_ldap_1 backup

---

version: '3.5'

services:

  crond:

    build:

      context: crond/

    volumes:

      - /run/docker.sock:/run/docker.sock

  ldap:

    build:

      cache_from: