HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Svelte is a free and open-source front end compiler created by Rich Harris and maintained by the Svelte core team members.
Vercel is a cloud platform for static frontends and serverless functions.
Vimeo is a video hosting, sharing and services platform. Vimeo operation an ad-free basis by providing subscription plans.