*Note: typically you can see the image on this page after choosing the option to Debug. It may be nessessary to also choose the option to Fetch new scrape to have this update.
For the Builder, you will want to update the code before adding to your Control panel.
Instead of using the body tag you will replace this with the title tag as listed below:
Enter this code under Site Analytics in the Settings section and click on save changes.
Instead of publishing the website you will want to publish your sitemap by clicking on Site Analytics and Sitemap. You can then debug the image as illustrated above (Deveopers.facebook.com/tools/debug)
So now potentially any website can have the ability to have an image appear with their link on Facebook!