feat: rebrand to Domain Scanner platform

Replace GeoExport static site with Next.js domain intelligence app:
real DNS/WHOIS/SSL/HTTP/geo scans, SSE progress, Docker stack,
updated install/uninstall scripts, and full documentation.

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

docs/API.md

@@ -0,0 +1,51 @@
+# API Reference
+
+Base URL: your deployment origin (e.g. `http://SERVER_IP`)
+
+## POST /api/scan
+
+Start a domain scan.
+
+**Body**
+
+```json
+{ "domain": "example.com" }
+```
+
+**Response**
+
+```json
+{ "id": "clx...", "domain": "example.com" }
+```
+
+## GET /api/scan/:id
+
+Poll scan status and full result.
+
+## GET /api/scan/:id/stream
+
+Server-Sent Events. Each event:
+
+```json
+{ "id": "...", "status": "RUNNING", "progress": 45, "domain": "example.com" }
+```
+
+## GET /api/export?id=:scanId&format=json|csv
+
+Download completed scan.
+
+## GET /api/scan
+
+List recent scans (public metadata).
+
+## POST /api/monitors
+
+Requires session. Body: `{ "domain": "example.com", "type": "DNS" }`
+
+## GET /api/health
+
+Database connectivity check.
+
+## Rate limits
+
+Default 30 scans/hour per IP (`SCAN_RATE_LIMIT_PER_HOUR`).