build(deps): update to Next.js v16 + use image digests instead of tags

Ref:
- https://docs.docker.com/dhi/core-concepts/digests/
- https://github.com/goldbergyoni/nodebestpractices/blob/master/sections/docker/image-tags.md
- https://emmer.dev/blog/what-is-a-docker-digest/

apps/website/proxy.ts

@@ -0,0 +1,26 @@
+import { routing } from "@repo/i18n/routing"
+import createIntlMiddleware from "next-intl/middleware"
+
+const intlMiddleware = createIntlMiddleware(routing)
+
+export default intlMiddleware
+
+export const config = {
+  matcher: [
+    // Enable a redirect to a matching locale at the root
+    "/",
+
+    // Next.js issue, middleware matcher should support template literals:
+    // https://github.com/vercel/next.js/issues/56398
+    "/(en-US|fr-FR)/:path*",
+
+    /*
+     * Match all request paths except for the ones starting with:
+     * - api (API routes)
+     * - _next/static (static files)
+     * - _next/image (image optimization files)
+     * - favicon.ico (favicon file)
+     */
+    "/((?!api|_next/static|_next/image|images|favicon.ico|robots.txt).*)",
+  ],
+}