Doing What Markdown Can't: Specifying Image Width and Height
By default, the Markdown renderer in Hugo, at this point in time, is Goldmark, a CommonMark compliant renderer.
CommonMark makes no provisions for manually specifying the width or height of an image.
There’s various extensions, like those for Pandoc, Kramdown, and GFM, but Goldmark doesn’t support those.
Google is getting a little cranky with the amount of CLS on some pages, especially on mobile, so it’s a good idea for me to start specifying sizes for most images.
How should I do this? By hacking it on as a feature that is in no way the intended use for anything involved.