How to store Images in S3 bucket?

in my express application, I have my images being saved to a folder in my repo.

However i dont think this is correct i should store them somewhere else, i thought s3 would be a good option.

Ive never done it before so i have no idea how it works.

My currrent code saves the image after scaling it:

  // check if there is no new file to resize
  if (!req.file) {
    next(); // skip to the next middleware
    return;
  }
  const extension = req.file.mimetype.split('/')[1]
  req.body.photo = `${uuid.v4()}.${extension}`
  // now we resize
  const photo = await jimp.read(req.file.buffer)


  await photo.cover(300, 300);
  // await photo.resize(800, jimp.AUTO);

  await photo.write(`./public/uploads/${req.body.photo}`);
  // once we have written the photo to our filesystem, keep going!
  next()
};```
Whats the process in order to save the images to aws s3?

Thanks