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/

turbo.json

@@ -1,5 +1,6 @@
 {
   "$schema": "./node_modules/turbo/schema.json",
+  "noUpdateNotifier": true,
   "ui": "tui",
   "tasks": {
     "build": {