Overview

Let blog owners upload a default image for social media previews (when a post doesn't have an image to display).

Implementation

• Add this option on the blog's Customize page for Pro and Team users, mentioning a suggested width of 1600px
• Upload images to Snap.as, and set the collection attribute social_banner
• Automatically resize to suggested width
• Uploading a new banner should delete the old one and replace it
• Collections and collection posts should check this collection attribute and set it in the metadata for the page