I have a form where I need to submit img url. Once submitted, it should be appended as an image in the list below the form. How can add image URL value to the list? Currently I have this code but it does't work:

```
$(document).ready(function(){
  $('#imageListForm').submit(function(event){
    event.preventDefault();

      let postPic = $('#imgLink').val()
      $('#imageList').append($('<li>' + '<img src=$("postPic")>' + '</li>'))

    });
  });

```