Cron service on Alpine Docker container

From base image Alpine added tini bash mariadb-client packages.
mariadb-client package is used to run remote query on another container who runs MariaDB.
bash installed because I prefer this shell.
tini added because https://github.com/krallin/tini#why-tini

Running the container

docker run -d --name "my-cron" neomediatech/cron

Configuration

Map a volume where you put your crontab file, for ex:
docker run -d -v /srv/crontab:/var/spool/cron/crontabs --name "my-cron" neomediatech/cron

Reload cron service

No need to reload the service. If you made changes on /var/spool/cron/crontabs/root you can notify it to cron service running this command:
docker exec my-cron bash -c 'echo "root" > /var/spool/cron/crontabs/cron.update'.
Wait a minute (really) and cron will get the changes.

Running your own scripts

Map a volume where you put your own scripts, for ex:
docker run -d -v /srv/crontab:/var/spool/cron/crontabs -v /srv/my-scripts:/scripts --name "my-cron" neomediatech/cron.
Afterwards put a line on /var/spool/cron/crontabs/root to execute the script when you want, for ex:
docker exec my-cron bash -c 'echo "0 5 * * * /scripts/my-script.sh" >> /var/spool/cron/crontabs/root'
and then
docker exec my-cron bash -c 'echo "root" > /var/spool/cron/crontabs/cron.update'

Logs

Cron logs output visible on docker logs (docker logs my-cron)

Stack

docker-compose.yml contains an example