NewLogger returns an instance of logger.

Debug has verbose message.

Error is for logging errors.

Fatal is for logging fatal messages.

Info is default log level.

Warn is for logging messages about possible issues.

Configuration stores the config for the logger For some loggers there can only be one level across writers, for such the level of Console is picked by default.

Logger is our contract for the logger.

Fields Type to pass when we want to call WithFields for structured logging.