code: function initLogging(conf) {
      logger.setLevels({
          error: 0,
          warn: 1,
          info: 2,
          verbose: 3,
          debug: 4,
          silly: 5
      });
      logger.addColors({
          debug: 'green',
          info: 'cyan',
          silly: 'magenta',
          warn: 'yellow',
          error: 'red'
      });
  
      logger.remove(logger.transports.Console);
      logger.add(logger.transports.Console, {
          level: conf.level || DEF_LOGGER_LEVEL,
          silent: conf.silent || DEF_LOGGER_SILENT,
          colorize: true,
          timestamp: true
      });
  }
docs: /* Logging system