Log config errors

[micimize]

Problem:
If there is any error while attempting to load the config, it is ignored and the error is swallowed. This makes it needlessly difficult to debug errors.

Solution:
Log the errors, and maybe provide a runtime option to abort startup if the config loading fails.

Additional context
I'd guess that ignoring a buggy config and starting up anyways is not a valuable behavior in most scenarios

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[micimize]

Relatedly, this makes the hot reload behavior when a config has an error:

• ignore the config and reload
• stop watching the config for changes because it's no longer part of the app