How to save image coming from multer memory disk?

I use multer in nodejs to handle multipart/formdata request and get the image file on the request like this :

import multer from "multer";

const upload = multer({
  storage: multer.memoryStorage(),
  limits: { fileSize: 1000000000, files: 2 },
});



app.post("/", upload.single("image"), (req, res , next) => {
      const imageFile = req.file

      dbx
        .filesUpload({ path: "/image.png", contents: imageFile })
        .then((response: any) => {
         
        })
        .catch((uploadErr) => {
         
        });
    }
  )

The problem is I can't upload the image and it gives me error that it's a Buffer not an actual image . How can I generate the image from req.file then upload it without saving it on the disk ?

from How to save image coming from multer memory disk?