Add AI DEV Node deployment foundation

CLAUDE.md

@@ -0,0 +1,32 @@
+# ACS Project Rules
+
+## Deployment Target
+
+ACS must follow the AI DEV deployment guide in `docs/AIdev.md`.
+
+- Deploy as a Node.js application.
+- Use port `3000`.
+- Use the `DATABASE_URL` supplied by `.project-env` / AI DEV.
+- Do not depend on a self-managed PostgreSQL container for AI DEV deployment.
+- Keep `.project-env` and `.env` out of git.
+- Build and deploy through the root `Dockerfile`.
+
+## Current Migration Direction
+
+- The legacy Spring Boot backend remains only as a behavior reference until Node parity is complete.
+- The React frontend should be preserved where possible.
+- Keep the existing `/api` contract and response envelope stable:
+
+```json
+{ "code": 200, "message": "OK", "data": {} }
+```
+
+## Required Checks
+
+- `npm run typecheck`
+- `npm run build`
+- `npm run db:check` in the AI DEV project folder where `.project-env` is loaded
+- `curl 127.0.0.1:3000/healthz`
+- `curl 127.0.0.1:3000/db`
+
+`npm run minio:check` and `/s3` intentionally report skipped because ACS currently does not use S3/MinIO storage.