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/next.config.ts

@@ -11,12 +11,12 @@ const nextConfig: NextConfig = {
   images: {
     unoptimized: true,
   },
-  eslint: {
-    ignoreDuringBuilds: true,
-  },
   typescript: {
     ignoreBuildErrors: true,
   },
+  experimental: {
+    turbopackFileSystemCacheForDev: true,
+  },
 }
 
 const withNextIntl = createNextIntlPlugin({