Using getmail with IMAP IDLE in Docker

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I'm currently running getmail with IMAP IDLE as a systemd service.

I want to move my project to a Docker container. But it seems systemd is
not recommended with Docker.

What I need is getmail to restart if it stops waiting. For example if there
is a timeout or a problem with the Internet connection.

Is there a solution to this, without using systemd? I would prefer not to
setup polling using a cronjob.

Thanks!

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