How do I change the input type="file" path and submit form with another image?

I need to upload multiple images that are inside my application.

My form is this:

<form id="uploadForm" enctype="multipart/form-data">
                <div class="file-field input-field offset-s4">
                    <div class="btn gradient-45deg-blue-indigo">
                        <span  id="total" >Arquivo(s)</span>
                        <input type="file" id="file" name="Imagem" />
                    </div>
                    <div class="file-path-wrapper">
                         <input id="fileUpload" class="file-path validate" type="text" placeholder="Escolha um ou mais imagens">
                    </div>
                </div>
                <div class="demo-container center">

            <img id="list" class="materialboxed responsive-img" src="" alt="">

            </div>
            <img id="list2" class="materialboxed responsive-img center" src=""></img>
            <p id="imgvalor" class="center"></p>
            <button onclick="nuvem()" class="btn btn-success waves-effect waves-light gradient-45deg-blue-indigo" id="enviar" name="action">Nuvem<i class="mdi mdi-cloud-upload left"></i></button>

        </form>

This is my array of images:

elemento=[
 'assets/cf10/f10d1.jpg',
 'assets/cf20/f20d1.jpg',
 'assets/cf30/f30d1.jpg',
 'assets/cf40/f40d1.jpg',
 'assets/cf50/f50d1.jpg'
 ]

After having my array, I use this function to transform the images into base64:

const toDataURL = url => fetch(url)
  .then(response => response.blob())
  .then(blob => new Promise((resolve, reject) => {
    const reader = new FileReader()
    reader.onloadend = () => resolve(reader.result)
    reader.onerror = reject
    reader.readAsDataURL(blob)
  }))

Then I call the function that will change the image in my html tag:

var imgmudar = 
toDataURL(elemento[2])
  .then(dataUrl => {
    document.getElementById('list').src = dataUrl; 
  })

Now that I have the image loaded into the DOM, I can use my function that does a local rendering:

    var tempototloc;
    function tempoLocal() {
        var fim = new Date().getTime();
        var tempo = fim - inicio;
        var d = new Date();
        tempototloc = tempo;

        document.getElementById('TempoExec').value = tempo +' ms';
        document.getElementById('OndeProc').value = 'Local';
        document.getElementById('DataExec').value = d.getDate() +'/'+ (d.getMonth()+1)+'/'+d.getFullYear()+' '+d.getHours()+':'+d.getMinutes()+':'+d.getSeconds();

                $('#enviarDados').ajaxForm({
                    url:'/enviar/dados',
                    type:'post',
                        success: function(data){                         
                        }
                }).submit();    
                swal('Foram encontradas '+contface+ ' face(s)', 'O tempo Local foi de '+tempototloc+' ms', 'success');

    }

    var inicio;
    var contface = 0;
    function local() {
    inicio = new Date().getTime();

    (function(){
    var img = document.getElementById('list');
        var tracker = new tracking.ObjectTracker(['face']);
        tracker.setStepSize(1.7);
        tracking.track('#list', tracker);
        var face = [];
        var i = 0;
        tracker.on('track', function(event) {
            event.data.forEach(function(rect) {
            window.plot(rect.x, rect.y, rect.width, rect.height);
            i++;
            face[i] = rect.x + '-' +rect.y;            
            });

            document.getElementById('contar').innerHTML = i+' faces encontradas';
            contface = i;
        });

        window.plot = function(x, y, w, h) {
            var rect = document.createElement('div');
            document.querySelector('.demo-container').appendChild(rect);
            rect.classList.add('rect');
            rect.style.width = w + 'px';
            rect.style.height = h + 'px';
            rect.style.left = (img.offsetLeft + x) + 'px';
            rect.style.top = (img.offsetTop + y) + 'px';
        };


        }());
    setTimeout(tempoLocal, -1);


    }                 


    $('#file').click(function(){
            $('.rect').removeAttr('style');
            $('#imgvalor').html("");
        });

At this point, okay, the problem is when I submit the form to the server, the image is not read (I do not know if I'm using an input type="file") because when I manually load the image I can perform the function below, but when I make this change of the image through the previous functions does not work, it is as if I did not load this information somewhere for the form to send to the server.

My send function to the server is this:

     var time1 = 0;
     var time2 = 0;
     var contfaceserv = 0;
function serverdet(){
                $('#uploadForm').ajaxForm({

                    url:'/upload',
                    type:'post',
                    success: function(data){
                    $('#imgvalor').html(data.msg);
                    $('#list').attr('src', data.file);
                    $('#contar').html(data.qtdface);
                    $('#faces').html(data.arrface);
                    contfaceserv = data.qtdface;
                    dadosnuvem();
                }

           });


}


function dadosnuvem(){
    time2 = new Date().getTime();
    var time3 = time2 - time1;
    var d = new Date();

    document.getElementById('TempoExec').value = time3 +' ms';
            document.getElementById('OndeProc').value = 'Nuvem';
            document.getElementById('DataExec').value = d.getDate() +'/'+ (d.getMonth()+1)+'/'+d.getFullYear()+' '+d.getHours()+':'+d.getMinutes()+':'+d.getSeconds();

                    $('#enviarDados').ajaxForm({
                        url:'/enviar/dados',
                        type:'post',
                            success: function(data){

                            }
                    }).submit(); 
                    swal('Foram encontradas '+contfaceserv+ ' face(s)', 'O tempo na Nuvem foi de '+time3+' ms', 'success');
}

        function nuvem(){
            time1 = new Date().getTime();
            serverdet();

        }

I also have this function that reads the file when the event is performed in the file:

(function() {

     function handleFileSelect(evt) {
        let files = evt.target.files; // Lista de Arquivos

        // Laço para pegar lista de arquivos e renderizar os Previews
        for (var file of files) {

            // Somente irá processar se for imagem
            if (!file.type.match('image.*')) {
                continue;
            }

            var imagem = new Image(); //Instancia do Objeto Image acessar imagens
            var reader = new FileReader(); //Instancia do FileReader acessar arquivos

            // Função para percorrer informações dos arquivos
            reader.onload = (function(theFile) {
                // Renderizando Previews
                imagem.src = theFile.target.result;

                //var span = document.createElement('span');

                var nome = '${theFile.target.result}';

                var output = [];

                imagem.onload = function() {

                var height = this.height,
                     width = this.width;

                     document.querySelector('.arquivo').innerHTML = '<ul>${file.type || 'n/a'}</ul>';
                     document.querySelector('.tamanho').innerHTML = '<ul>${file.size+' bytes' || 'n/a'}</ul>';
                     document.querySelector('.dimensao').innerHTML = '<ul>${width}x${height}</ul>';

                     document.getElementById('TipoStatus').value = file.type ? file.type : 'n/a';
                     document.getElementById('TamStatus').value = file.size ? file.size + ' bytes' : 'n/a';
                     document.getElementById('DimStatus').value =  width +'x'+height;


                let result = '<li><b> -  bytes - </b>';

                //document.getElementById('#list').insertBefore(span, null);
                document.getElementById('list').src = nome;

                }
            });

            // Ler arquivo da imagem com uma URL.
            reader.readAsDataURL(file);
        }
    }

    document.getElementById('file').addEventListener('change', handleFileSelect, true);


}());

I know that my code is messed up, but I need to automate this sending process, because manually, although it can be very time-consuming.

I saw the use of promisses, but I'm not sure how to mount logic in a synchronic way (image1 -> local () and then cloud () - > image 2 ...) , by I'm trying to do this by using an array of the images and then calling the local () function and another () cloud for each image I have in my array list. How do I accomplish the feat of loading the image, and call my functions for each one?