Google Sign-In is a secure authentication system that reduces the burden of login for users, by enabling them to sign in with their Google account.
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.