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/assets/utils/url.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Creates a URL object from a path or URL string, using a placeholder base for relative paths.
+ * This allows safe manipulation of URLs using the native URL API.
+ *
+ * @param pathOrUrl - A relative path (e.g., '/_astro/image.png') or absolute URL (e.g., 'https://cdn.example.com/...')
+ * @returns A URL object that can be safely manipulated
+ */
+export declare function createPlaceholderURL(pathOrUrl: string): URL;
+/**
+ * Extracts the pathname and search parameters from a URL created with `createPlaceholderURL`.
+ * Removes the placeholder base, returning just the path and query string.
+ *
+ * @param url - A URL object created with `createPlaceholderURL`
+ * @returns The URL string without the placeholder base
+ */
+export declare function stringifyPlaceholderURL(url: URL): string;