text: import app from './app'
  import router from './router';
  
  new Promise((resolve, reject) => {
          router.push(url);
          router.onReady(() => {
              const matchedComponents = router.getMatchedComponents();
              if (!matchedComponents.length) {
                  return reject({
                      code: 404
                  });
              }
              resolve(app);
          }, reject);
      })
      .then(app => {
          renderVueComponentToString(app, (err, res) => {
              print(res);
          });
      })
      .catch((err) => {
          print(err);
      });
  