Make build logs less verbose

Build logs are too verbose and it's had to tell if there were failures and what those failures were.

We should make the output less verbose and make it more prominent what failed.

I think there should be at least three log levels: Error, Info and Debug.

When building the daily updates, the log level should be set to error and only show the failures. Also, see if we can add a green or red border to the automatic message posted on Slack to better show if the task succeeded or failed.

When running netlify, the level should be set to info, which prints some information about the current step being run (but not as much as we're showing now) and also the errors at the end.

The Debug level could be used in development if we wanted to see all the progress.