Great starter for 11ty. I did a few updates for my setup that I'd love to share with you one day, when I have some time. I added globbing for scss and js so you don't need to manually add each component scss and js to the main files.
When building and watching development, images are getting processed The below error shows in terminal.
I looked at the js for the image shortcode and it looks like the correct properties are being provided the the 11ty Image plugin. Are you coming across this error?