Images are large and cause slow page performance

[rjbeers]

One can see complaints about performance on this lighthouse report. The vast majority of complaints are about time spent serving images. These images need to be optimized in some way.

• Can they be made smaller? Main images were addressed in d8b5d80
• Would it hurt to add loading="lazy"?
• Do we need to do something more drastic with JS?

[rjbeers]

Now, we have a 60 lighthouse performance score. I think to beat this score, we are left with doing something more drastic like a site rewrite on a static site generator that will optimize images and inline more into the html. I'd rather discuss this on a separate issue.