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/vfile/lib/minurl.browser.d.ts

@@ -0,0 +1,9 @@
+/**
+ * @param {URL | string} path
+ *   File URL.
+ * @returns {string}
+ *   File URL.
+ */
+export function urlToPath(path: URL | string): string;
+export { isUrl } from "./minurl.shared.js";
+//# sourceMappingURL=minurl.browser.d.ts.map