I like how you used Carbon. That's a great use for it to use it in the cover image of an article. Adding your own text to customize it is great too. I really like what Samantha Ming is doing with code examples. Those look really nice.
Accessibility is a big thing to make sure the code is still usable to everyone. Maybe the simple solution is to use the code image and make it a link out to a gist where the code can be copied and read by a screen reader. Or the gist could be embedded below the image.
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