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/README.md

@@ -0,0 +1,9 @@
+# Nuxt app for Docker Registry AIO
+
+```bash
+npm install
+npx prisma migrate dev
+npm run dev
+```
+
+See the repository root README for full Compose usage.