Accept one or two images. Text is optional. <img width="1294" alt="Screen Shot 2021-02-19 at 5 18 45 PM" src="https://user-images.githubusercontent.com/3860311/108567864-06a5db00-72d7-11eb-8d0e-5865eea26356.png"> <img width="1757" alt="Screen Shot 2021-02-19 at 5 20 47 PM" src="https://user-images.githubusercontent.com/3860311/108567871-0b6a8f00-72d7-11eb-9823-9afbbfff0b37.png"> @ampproject/wg-stories
