I am attempting to store images in MongoDB using GridFS

The images are uploaded on the client side so I'd like to use a fetch post-call that hits a route in my express server. That route is a post request to MongoDB using GridFS

Below is the fetch call:

function postDesignImages(order) {
  order.designs.map(async (design) => {
    var file = new File([design.image], design.image);
    console.log(file);

    await fetch('http://localhost:9000/design-images', {
      method: 'POST',
      mode: 'cors',
      body: file,
    })
      .then((res) => res.text())
      .then((data) => {
        console.log(data);
      })
      .catch(function (error) {
        console.log('Looks like there was a problem: \n', error);
      });
  });
}

Next are my end points... I'm calling the last one listed:

app.use('/', indexRouter);
app.use('/orders', orderRoutes);
app.use('/users', userRoutes);

app.use('/design-images', () => {
  router.post('/', (req, res) => {
    console.log(req.body);
    upload.single(req.body);
  });
});

There are several areas that I can see being the problem.

1. As you can see I'm attempting to attach an actual file to the body of the fetch call. In the past, I've only used fetch bodies that were stringified JSON. The logged file object looks like this: File {name: 'blob:http://localhost:3000/8afdcdef-5426-460a-8cfa-eea24cc80856', lastModified: 1632324928209, lastModifiedDate: Wed Sep 22 2021 11:35:28 GMT-0400 (Eastern Daylight Time), webkitRelativePath: '', size: 63, …}
2. The file itself might not be formatted correctly. I'm currently making a file out of a http blob. Despite the blob linking to an image, I could be converting the blob into a file that's not actually an image file.
3. I could be creating the endpoint wrong in the express. As you may be able to tell, I have most of my routes in a routes folder except the 'design-images' route. Is it possible that I'm causing unintended errors by adding routes in 2 different manners? The frustrating part is there is no error message. Node just tells me: POST /design-images - - ms - - so I guess the route was hit but then nothing happens? I don't really know what to make of that output.

Any insight would be greatly appreciated. If you need any additional information feel free to ask.