Cannot display image from Symfony to Angular

There is an image in the public folder of my Symfony project. I placed it in the root directory of the project inside a folder named images. Then in my Angular component I want to access it :

@Component({
  selector: 'app-tiers',
  templateUrl: './tiers.component.html',
  styleUrls: ['./tiers.component.scss']
})
export class TiersComponent implements OnInit {
  ...
  imagePath = 'http://localhost:4300/images/dflt.png';
  ...
}

In the Angular template :

...
<img [src]="imagePath" >
...

But at runtime the image is not displayed ; the dev console returned Not found.

Then I moved the image in the folder named public within the Symfony root. But still cannot display the image.

So what is the problem ?