docs: add gif of example images, small explanation

### What does this PR do?

* Adds gif on how to pull our test image
* Adds link to our VM guide on how to test it after building

### Screenshot / video of UI

<!-- If this PR is changing UI, please include
screenshots or screencasts showing the difference -->

N/A, see doc

### What issues does this PR fix or reference?

<!-- Include any related issues from Podman Desktop
repository (or from another issue tracker). -->

Closes #342

### How to test this PR?

<!-- Please explain steps to reproduce -->

N/A, doc

Signed-off-by: Charlie Drage <[email protected]>

README.md

@@ -70,6 +70,12 @@ Want to view more example images Such as [`httpd`](https://gitlab.com/bootc-org/
 
 All of our maintained example images are on the [gitlab.com/bootc-org/examples](https://gitlab.com/bootc-org/examples) repo.
 
+You can also pull our example image based on the [`httpd`](https://gitlab.com/bootc-org/examples/-/tree/main/httpd) example:
+
+![](https://raw.githubusercontent.com/containers/podman-desktop-media/bootc-extension/gifs/clicking_pull.gif)
+
+After building, read our [Virtual Machine Guide](/docs/vm_guide.md) on how to launch your image and access your HTTP server.
+
 ## Use Case
 
 Go from a [bootc](https://containers.github.io/bootc/) compatible derived container build to a disk image format: