Task scheduler with the retry function in case of error

[morawskim]

Instead of using systemd timer to download information about free book use nest-schedule.
In this way, we remove dependency on configuring systemd.
We don't want HTTP application. Only CLI command which we run in docker container. This library also has support for retry if error.
More research is required to check it is even possible.
https://github.com/miaowing/nest-schedule

Other solution is using airflow - https://airflow.apache.org/