Add Docker Registry AIO with Nuxt Token Auth and admin UI.

Compose brings up registry:3 plus a Prisma/SQLite Nuxt app for docker login, ACL management, and image browsing with shadcn-vue.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/.dockerignore

@@ -0,0 +1,8 @@
+node_modules
+.nuxt
+.output
+.data
+*.db
+*.db-journal
+.env
+README.md