In its current configuration, the logger outputs lines of structured JSON to
a file called `checkly.debug.log` in the current directory. This will change
later.

By default, logs are silenced. Only when you set CHECKLY_LOG_LEVEL, does the
log file actually receive any content.

Although the logging is going to be fairly excessive especially for larger
projects, this should hopefully be enough to give us at least some clue
about the ongoing 408 issues with certain projects.