Seeing as the site is hosted on a Linux server, I’ll go ahead and document this. This is how to set up HSTS Preload for your website, by using .htaccess.
If you want to get your site hard-coded into Google Chrome as an “HTTPS Only” site, it’s actually relatively easy – once you know how to do it. You can verify that this site is listed here.
Open your site with your favorite FTP application, I prefer Filezilla. Make sure that you’ve set it to show hidden files. (Files prefaced with a period are hidden files by default.) Edit your .htaccess and add the following:
Save your file to your server and check your site for yourself.
Why do this? It’s added security for your visitors and it’s quite probable that Google has a preference for sites who have taken the time to do so. That may lead to more traffic and happier traffic because they know your site is using HTTPS.