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/astro/dist/cli/info/infra/noop-package-manager.js

@@ -0,0 +1,9 @@
+class NoopPackageManager {
+  name = "unknown";
+  async getPackageVersion() {
+    return void 0;
+  }
+}
+export {
+  NoopPackageManager
+};