code: function reloadWorker(info) {
      if (!config.reloadOnDebug) {
        return;
      }
  
      if (isAssetsDir(info.path) || info.isDirectory) {
        return;
      }
  
      // don't reload if don't match
      if (config.reloadPattern && multimatch(info.path, config.reloadPattern).length === 0) {
        return;
      }
  
      logger.warn(`[agent:development] reload worker because ${info.path} ${info.event}`);
  
      process.send({
        to: 'master',
        action: 'reload-worker',
      });
    }
docs: reload app worker:
  [AgentWorker] - on file change
  |-> emit reload-worker
  [Master] - receive reload-worker event
  |-> TODO: Mark worker will die
  |-> Fork new worker
  |-> kill old worker
  
  @param {Object} info - changed fileInfo