Suggestion: Upgrade Starters & Templates to Next.js v12

[slavakurilyak]

It's time to upgrade Next.js from 11 to 12, the latest version!

Why?

Next.js 12 is Vercel's biggest release ever!

• Rust Compiler: ~3x faster Fast Refresh and ~5x faster builds
• Middleware (beta): Enabling full flexibility in Next.js with code over configuration
• React 18 Support: Native Next.js APIs are now supported, as well as Suspense
• Image AVIF Support: Opt-in for 20% smaller images
• Bot-aware ISR Fallback: Optimized SEO for web crawlers
• Native ES Modules Support: Aligning with the standardized module system
• URL Imports (alpha): Import packages from any URL, no installs required
• React Server Components (alpha): Try it today, including SSR streaming

To get started, here's an upgrade guide from 11 to 12.