title: Flutter web - Upload Image File to Firebase Storage
body: <p>On flutter web, I pick an image file from the computer and get a File image object. Then I want to upload it to Firebase Storage. For Android and iOS versions of the app I was using a Firebase Cloud Function and an http multipart request. It worked, but for the web version of the app it doesn't. So, </p>
  
  <p>How can I upload an html image file to Firebase Storage, either directly or through a Cloud Function?</p>