Updating the site build tool

I've experimented with converting the bash scripts that build this site into Rust. Now the site can be built by Netlify each time I push to the repo. In the process of learning how to setup a repo so that it can be built by Netlify, I also learned that probably my bash scripts could also be used. I might revisit that in the future. The most confusing part of the conversion process was that you have to (apparently?) install a netlify-plugin-image-optim in order to have ImageMagick available. I could be 100% wrong about that, but it was the only way I could get the images to build.