refactor: Move Astro to root, use PORT env (default 80), allow all hosts

- Move Astro files from dealplustech-astro/ to project root
- Update Dockerfile: PORT environment variable (default 80)
- Add vite.config.ts with allowedHosts: true
- Matches nixpacks behavior for Easypanel deployment
- No hardcoded ports or domains

node_modules/@astrojs/telemetry/dist/config-keys.js

@@ -0,0 +1,8 @@
+const TELEMETRY_ENABLED = "telemetry.enabled";
+const TELEMETRY_NOTIFY_DATE = "telemetry.notifiedAt";
+const TELEMETRY_ID = `telemetry.anonymousId`;
+export {
+  TELEMETRY_ENABLED,
+  TELEMETRY_ID,
+  TELEMETRY_NOTIFY_DATE
+};