How to add pictures in laravel?

Question

Web development

Not strong in laravel, so such a question?)
I copied the view from another file
There is a view

<script>
$(function () {
        $("#uploadBtn").change(function () {
            $('#fn').html($('#uploadBtn').val());
        });
    });

    $(document).on('click', '.sub-data', function () {
        var dis = document.getElementById('upload_for');
        var uploadBtn = document.getElementById('uploadBtn');
        var msg = document.getElementById('msg');

        if (dis.value == "") {
            msg.innerHTML = "Please Select Employee for Display.";
            dis.focus();
        } else if (uploadBtn.value == "") {
            msg.innerHTML = "Please Select File for Upload.";
            uploadBtn.focus();
        } else {
            msg.innerHTML = "";
            document.frmAddFile.submit();

        }
    });
</script>
<td>
      <div class="fileUpload btn btn-success" style="width: 130px; margin-left: 1px;">
            <span>Upload File</span>
            <input id="uploadBtn" type="file" value="" required="true" name="custImage" class="upload"/>
      </div>
</td>
<button type="button" class="btn btn-outline sub-data">Save changes</button>

Tell me where to look? What models are created and controllers? Where to change something so that everything works, the file was added and the image data in the database