[Documentation] [Low priority] Add to the config.toml template and documentation a section for logging

[uriel-kluk]

After running iotedge check I get the following warning

‼ production readiness: logs policy - Warning
    Container engine is not configured to rotate module logs which may cause it run out of disk space.
    Please see https://aka.ms/iotedge-prod-checklist-logs for best practices.
    You can ignore this warning if you are setting log policy per module in the Edge deployment.

The link points to the config.toml documentation, but the section for log-policy doesn't exist.

Suggestion: add the log-policy description to the best practices document.

[yophilav]

@uriel-kluk
Thank you for reporting the issue. 😄 The document https://aka.ms/iotedge-prod-checklist-logs suggested that we updated the log policy in daemon.json which configured the underlying docker log service. On the other hand, the config.toml is a configuration that we used to configure the iotedged. I believe the document is accurate. Please let me know if I'm missing something. Thanks!

[ryanwinter]

Closing as no action required. @uriel-kluk please reopen if you think this is still an issue or have more questions.