hello i want to use image by using dynamic source how can i add image in footer

Hi,
I hope you are doing good.
You can create a setting like this

{
       "type": "image_picker",
      "id": "footer_image",
      "label": "Image"
    }

and it will show you option to attach image metafield

Create a metafield with type file and attach it here
I hope the above is useful to you.
Thanks!