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/remoteProbe.d.ts

@@ -0,0 +1,13 @@
+import type { AstroConfig } from '../../types/public/config.js';
+import type { ImageMetadata } from '../types.js';
+type RemoteImageConfig = Pick<AstroConfig['image'], 'domains' | 'remotePatterns'>;
+/**
+ * Infers the dimensions of a remote image by streaming its data and analyzing it progressively until sufficient metadata is available.
+ *
+ * @param {string} url - The URL of the remote image from which to infer size metadata.
+ * @param {RemoteImageConfig} [imageConfig] - Optional image config used to validate remote allowlists.
+ * @return {Promise<Omit<ImageMetadata, 'src' | 'fsPath'>>} Returns a promise that resolves to an object containing the image dimensions metadata excluding `src` and `fsPath`.
+ * @throws {AstroError} Thrown when the fetching fails or metadata cannot be extracted.
+ */
+export declare function inferRemoteSize(url: string, imageConfig?: RemoteImageConfig): Promise<Omit<ImageMetadata, 'src' | 'fsPath'>>;
+export {};