title: Add div image over a form div
body: <p>I have this basic form</p>
  
  <pre><code>&lt;div class="card mb-5 card-central-responsive" style="min-height: 579px;"&gt;
    &lt;div class="card-body"&gt;
      &lt;form #apkCreationForm="ngForm" class="mt-2" novalidate  (ngSubmit)="onSubmitApk()"&gt;
        &lt;div role="alert" class="mb-&amp;  ng-star-inserted" style="padding-bottom: .10rem" ng-reflect-ng-class=""&gt;
          &lt;h4 class="alert-heading"&gt;{{ 'apk.product-description' | translate }}&lt;/h4&gt;
        &lt;/div&gt;
        &lt;div class="row"&gt;
          &lt;div class="col-6"&gt;
            &lt;label class="form-group has-float-label"&gt;
              &lt;input class="form-control" required ngModel #name="ngModel" name="name" [(ngModel)]="apkName"/&gt;
              &lt;span&gt;{{ 'apk.name' | translate }}&lt;/span&gt;
              &lt;div *ngIf="!name.valid &amp;&amp; apkCreationForm.submitted" class="invalid-tooltip"&gt;{{ 'apk.name-required' | translate }}!&lt;/div&gt;
            &lt;/label&gt;
          &lt;/div&gt;
          &lt;div class="col-6"&gt;
            &lt;label class="form-group has-float-label"&gt;
              &lt;ng-select
                [items]="isFree"
                bindLabel="id"
                name="isFree"
                bindValue="id"
                [(ngModel)]="isFreeSelected"&gt;
              &lt;/ng-select&gt;
              &lt;span&gt;{{ 'apk.is-free' | translate }}&lt;/span&gt;
              &lt;div *ngIf="!isFreeSelected &amp;&amp; apkCreationForm.submitted" class="invalid-tooltip"&gt;{{ 'apk.isfree-required' | translate }}&lt;/div&gt;
            &lt;/label&gt;
          &lt;/div&gt;
        &lt;/div&gt;
  
        &lt;/div&gt;
      &lt;/form &gt;
    &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>I have to add a div image on top of this form to have something like this:
  <a href="https://i.stack.imgur.com/CxsnJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CxsnJ.png" alt="enter image description here"></a></p>
  
  <p>I tried many solutions without success. Please how could I achieve this ?
  I use ng-bootstrap in my app
  Thanks in advance</p>