code: function configure_logging() {
    if ('log' in CONF) {
  
      if ('plugin' in CONF.log) { process.env.NODE_LOGGER_PLUGIN = CONF.log.plugin; }
      if ('level'  in CONF.log) { process.env.NODE_LOGGER_LEVEL  = CONF.log.level; }
  
      if ('customlevels' in CONF.log) {
        for (var key in CONF.log.customlevels) {
          process.env['NODE_LOGGER_LEVEL_' + key] = CONF.log.customlevels[key];
        }
      }
    }
  }
docs: Default configuration of logging