Remove deploy/ folder (belongs in Jannik-Cloud)

The Dockerfile, docker-compose snippet, Caddy fragment, and
generate-env.sh now live alongside the rest of the Jannik-Cloud
services — that's the one place that already knows how to manage
them. The MelodyMuse repo is now app-only: source, build config,
the Node server, and docs.

The README's 'Docker / Jannik-Cloud' subsection is replaced with a
short note pointing the reader at the Jannik-Cloud service directory
and the project-layout section no longer lists deploy/.

README.md

@@ -80,10 +80,12 @@ npm start          # node server.mjs, serves dist/ + /api/*
 
 Then put a reverse proxy (Caddy, nginx, …) in front of `localhost:3000`.
 
-### Docker / Jannik-Cloud
+### Deployment
 
-Reference files are in [`deploy/`](./deploy). See
-[`deploy/README.md`](./deploy/README.md) for the full deploy guide.
+This repo contains **only the app** — the Dockerfile, docker-compose,
+Caddy fragment, and `.env` generation script for the Jannik-Cloud
+service live alongside the rest of the Jannik-Cloud services. To
+deploy, copy them into a new `services/melodymuse/` directory there.
 
 ---
 
@@ -346,7 +348,6 @@ MelodyMuse/
 ├── server/
 │   └── prompts.mjs            # system + user prompt construction
 ├── server.mjs                 # ★ the runtime — serves SPA + /api/*
-├── deploy/                    # reference Dockerfile, compose, caddy, env script
 ├── public/favicon.svg
 ├── index.html
 ├── tailwind.config.js