Add README and server.py reference

README.md

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+# Apple Form
+
+Apple-style 3-field step-by-step customer form with FastAPI backend.
+
+## Frontend
+
+Single-file HTML (`index.html`) — zero dependencies, native system fonts.
+
+- 3-step wizard: Email → Name → Domain
+- Apple design system: `#f5f5f7` backgrounds, Apple Blue `#0071e3` accent, SF Pro typography
+- Slide animations between steps, step-dot progress indicator
+- SVG checkmark draw animation on success
+- POSTs to the backend at `http://192.168.1.121:8080/api/submit`
+
+### Open directly
+
+```bash
+firefox index.html
+```
+
+Or serve from an HTTP server:
+
+```bash
+python3 -m http.server 8000
+```
+
+## Backend
+
+FastAPI server in a Proxmox LXC CT:
+
+| Detail | Value |
+|---|---|
+| CT ID | 121 |
+| Hostname | form-login |
+| IP | 192.168.1.121 |
+| Port | 8080 |
+| Database | SQLite (`/srv/form-backend/submissions.db`) |
+| Service | `form-backend.service` (enabled, auto-start) |
+
+### Endpoints
+
+| Method | Path | Description |
+|---|---|---|
+| POST | `/api/submit` | Submit form data `{email, name, domain}` → `{ok, id}` |
+| GET | `/api/submissions` | List all submissions (JSON) |
+| GET | `/health` | Health check |
+
+### Test
+
+```bash
+curl http://192.168.1.121:8080/health
+curl -X POST http://192.168.1.121:8080/api/submit \
+  -H 'Content-Type: application/json' \
+  -d '{"email":"jane@example.com","name":"Jane","domain":"example.io"}'
+```
+
+### Server code
+
+`server.py` lives at `/srv/form-backend/server.py` on the CT.
+
+```bash
+ssh root@192.168.1.109 'pct exec 121 -- systemctl status form-backend'
+```