configPath() {
    let configPath = 'config';

    if (this.pkg['ember-addon'] && this.pkg['ember-addon']['configPath']) {
      configPath = this.pkg['ember-addon']['configPath'];
    }

    return path.join(this.root, configPath, 'environment');
  }
Returns the path to the configuration.

    @private
    @method configPath
    @return {String} Configuration path