Node.js 如何将图像文件作为对节点的响应发送

我尝试使用multer上传图像，并成功地将图像上传到名为images的后端文件夹中，当从angular frontend上传时，所有图像都存储在该文件夹中。 但我还想在调用api时将图像作为响应发送回一些json（）数据

这是我上传图片的代码：

/* app.js  */
const fileStorage = multer.diskStorage({
  destination: (req, file, cb) => {
    cb(null, 'images');
  },
  filename: (req, file, cb) => {
    console.log(file)
    console.log('filename =',file.filename)
    cb(null, uuidv4() + '-' + file.originalname);
  }
});

const fileFilter = (req, file, cb) => {
  if (
    file.mimetype === 'image/png' ||
    file.mimetype === 'image/jpg' ||
    file.mimetype === 'image/jpeg'
  ) {
    cb(null, true);
  } else {
    cb(null, false);
  }
};
app.use(
  multer({ storage: fileStorage, fileFilter: fileFilter }).single('image')
);

app.use(express.static(path.join(__dirname, 'public')));
app.use('/images', express.static(path.join(__dirname, 'images')));

上面的代码是上传图片的。我想知道如何创建一个api来获取图像以及其他数据，如标题、描述、价格

/* controller */
exports.postAddProduct = (req, res, next) => {
  const title = req.body.title;
  const image = req.file;
  const price = req.body.price;
  const description = req.body.description;
  Admin.findById(req.adminId)
  .then(admin=>{
    if(!admin){
      return res.redirect('/')
    }
    if(req.adminId !== admin._id.toString() ) {
      return res.redirect('/')
    }

     if (!image) {
        console.log('not found image')
      return res.status(422).json('Attached file is not an image.')
    }
    const errors = validationResult(req);
  
    if (!errors.isEmpty()) {
      console.log(errors.array());
      return res.status(422).json(errors.array()[0].msg,)
    }
    const imageUrl = image.path;
    const product = new Product({
      title: title,
      price: price,
      description: description,
      imageUrl: imageUrl,
      userId: req.adminId
    });
    product
      .save()
      .then(result => {
        console.log('Created Product');
        return res.status(201).json(result)
      })
  })
    .catch(err => {
      console.log(err)
      const error = new Error(err);
      error.httpStatusCode = 500;
      return next(error);
    });
};