I want to store a image files. Each image files’ names are their fields’ name. I’m using Nextjs

import path from "path";
import multer from 'multer'
import prisma from "@/lib/prisma";
import { NextResponse } from "next/server";

const latest = await prisma.items.findFirst({
  orderBy: {
    id: 'desc',
  },
});

const latestName = latest.name.replaceAll(" ", "-")


const storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, '/uploads/')
  },
  filename: function (req, file, cb) {
    cb(null, latestName + '-' + file.fieldname + path.extname(file.originalname))
  }
});

const upload = multer({storage : storage})

export const POST = async (req, res) => {

  upload.fields([{
    name: 'thumbnail', maxCount: 1
  }, {
    name: 'cover' , maxCount: 1
  }])

  return NextResponse.json({message : "success"
  })

};

export const config = {
  api: {
    bodyParser: false, 
  },
};

the message is responsed but files aren’t stored. I thought it’s a problem with the folder path, so I changed a path. So, path is correct, but still, I can’t store the image