Simple cron service that reads tasks from file cronjobs and executes them.
Edit cronjobs file, by adding for example:
*/5 * * * * curl -I http://example.com/ >> cronjobs.log
Build and run your container:
docker build -t curljob_image .
docker run -d --name curljob curljob_image
Check the logs
docker exec curljob cat /root/cronjobs.log