Here's a boring update, unless you love sysadmin work: my site now uses HTTP Secure, or HTTPS.
It seems overboard to add security to a static website, but browsers are now strongly warning people when sites are not secure.
It took me a few tries to get my website working over HTTPS. I currently use Amazon Web Services to host this site. Within AWS, the files are hosted on S3, cached on CloudFront, and routed from URLs with Route53. CloudFront has support for HTTPS built in, but it's tricky to have CloudFront serve over HTTPS with a custom domain.
Eventually, I landed on Matt Burgess's Medium blog on Hosting a HTTPS website using AWS S3 and CloudFront. This guide was very straightforward, and allowed for a much simpler set up than other guides. Thanks Matt!