This logback configuration is an example of diverting debug level logs for a specific package to a separate file, while maintaining info level in the main log. This allows viewing all package logs in context, and then when an info or warn level log appears, you can switch to the debug log and see that line in context with debug statements.
This is particularly useful for debugging a new or troublesome package in production without cluttering up your main log stream.
The main
appender is the primary appender to which all application logs are