我正在创建一个博客网站，并试图给予用户能够上传个人资料图片，我一直在尝试multer和各种配置，它一直告诉我错误：ENOENT：没有这样的文件或目录，打开'public/uploads/无论是这个还是请求通过，但没有图像被保存，有人能帮忙吗？
我的用户模式

username: String,
    email: String,
    password: String,
    profileImg:Buffer,
    googleId: String,
    facebookId:String,
    twitterId:String,
         created:{type: Date, required: true, default: Date.now}
     });

const storage = multer.diskStorage({
  destination: function(req, file, cb){

     cb(null,  './uploads');

},
filename : function(req, file, cb){
     cb(null, file.fieldname + "_" + Date.now() + "_" + file.originalname);
  }
});

const upload = multer({
  storage: storage,
});

post request to update users profile

app.post("/profilepic", upload.single("image"), (req, res)=>{
 console.log(req.file);
  User.updateOne({_id:req.user._id}, {$set:{profileImg: req.body.filename}}, (err)=>{
    if(err){console.log(err);}else{res.redirect("/settings")}
  })
  console.log(req.user);
});