Output logs in stdout instead of file

[jchanam]

Is your feature request related to a problem? Please describe.
When running as a cronjob in a kubernetes cluster, there's no way to see if the execution was successful or not as there's no output, and the log file is lost.

Describe the solution you'd like
A new flag to be added, such as --log-stdout that enables this feature. I've assumed that this would only be possible if the --save option is used, so the outputs don't collide with each other.

Describe alternatives you've considered
Add a fluentd to as a sidecar to tail the file and send the logs, but I think it's a little bit overkill.