Supabase Next.js Starter

The [Supabase Next.js Starter](https://github.com/vercel/next.js/tree/canary/examples/with-supabase) is the official template maintained by Vercel and Supabase for pairing Next.js with Supabase. Spin it up with `npx create-next-app --example with-supabase`, and you get cookie-based authentication that works across the App Router (server components, client, middleware) out of the box. It ships with Tailwind CSS and shadcn/ui already initialized, plus example sign-up and login flows. The fastest path to a Next.js app backed by a real Postgres database, auth, and storage.