[riaron]

пробовал так

let photo = document.getElementById("photo").files[0];
	  let formData = new FormData();
	  
	  formData.append("photo", photo);
	  fetch('/upload/image', {method: "POST", body: formData});

не получилось
еще так

var alphabet = "abcdefghijklmnopqrstuvwxyz";
  var randomIndex = Math.floor(Math.random() * alphabet.length);
////////////////////////////
  var randomLetter = alphabet[randomIndex];

  var file = document.getElementById("photo");
		file.files.item(0).name=md5(randomLetter+file.files.item(0).name);
	  if(file){
		  var file1 = fileInput.file;
			file1.Move("\files\sphoto\");
	  }