code: public function getBaseUrl()
      {
          if ($this->_baseUrl === null) {
              $request = Yii::$app->getRequest();
              if ($request instanceof Request) {
                  $this->_baseUrl = $request->getBaseUrl();
              } else {
                  throw new InvalidConfigException('Please configure UrlManager::baseUrl correctly as you are running a console application.');
              }
          }
  
          return $this->_baseUrl;
      }
docs: Returns the base URL that is used by [[createUrl()]] to prepend to created URLs.
  It defaults to [[Request::baseUrl]].
  This is mainly used when [[enablePrettyUrl]] is `true` and [[showScriptName]] is `false`.
  @return string the base URL that is used by [[createUrl()]] to prepend to created URLs.
  @throws InvalidConfigException if running in console application and [[baseUrl]] is not configured.