tl;dr:Certain things get overlooked when adding images to a site so Chris has created this checklist, starting with making "sure you use sentence-format alt text on the image to describe what the image depicts."
tl;dr:For Chris, the "big thing" about Astro is that it allows "you to build a site like you’re using a JavaScript framework (and you are), but the output is a zero-JavaScript static site. You can opt-in to client-side JavaScript as needed, and there are clever options for doing so."