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/destr/dist/index.d.mts

@@ -0,0 +1,8 @@
+type Options = {
+    strict?: boolean;
+};
+declare function destr<T = unknown>(value: any, options?: Options): T;
+declare function safeDestr<T = unknown>(value: any, options?: Options): T;
+
+export { destr as default, destr, safeDestr };
+export type { Options };