docs: function(message) {
          this._resetRestartTimeout(this.get('heartbeatTimeout'));
          if (!this._lastHeart) {
              this._isStartingUp = false;
              this._firstHeart = Date.now();
              logger.info('App started.');
  
              if (this.get('postLaunchCommand')) {
                  spawn(this.get('postLaunchCommand'), null, null, function(err, output) {
                      console.log(err, output);
                  });
              }
  
              if (this._startupCallback) {
                  this._startupCallback();
                  this._startupCallback = null;
              }
          }
  
          this._lastHeart = Date.now();
          this.trigger('heart');
      }