Next.js 14 was released at Next.js Conf 2023, marking a huge milestone in the project's stability and performance. This release includes Server Actions, which allow for entirely server-side authentication using Server Components. The App Router is also now compatible with Supabase, enabling users to build scalable apps with ease. To make this work seamlessly, Supabase created a package called `@supabase/ssr` that handles cookie configuration and storage on the server-side. Additionally, a Next.js and Supabase Starter Template has been created, allowing developers to focus on building their app without worrying about the technical details. The template can be generated using one command: `npx create-next-app@latest -e with-supabase`, guiding users through the process of creating a Supabase project and configuring environment variables.