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/prefetch/index.d.ts

@@ -0,0 +1,47 @@
+interface InitOptions {
+    defaultStrategy?: string;
+    prefetchAll?: boolean;
+}
+/**
+ * Initialize the prefetch script, only works once.
+ *
+ * @param defaultOpts Default options for prefetching if not already set by the user config.
+ */
+export declare function init(defaultOpts?: InitOptions): void;
+export interface PrefetchOptions {
+    /**
+     * How the prefetch should prioritize the URL. (default `'link'`)
+     * - `'link'`: use `<link rel="prefetch">`.
+     * - `'fetch'`: use `fetch()`.
+     *
+     * @deprecated It is recommended to not use this option, and let prefetch use `'link'` whenever it's supported,
+     * or otherwise fall back to `'fetch'`. `'link'` works better if the URL doesn't set an appropriate cache header,
+     * as the browser will continue to cache it as long as it's used subsequently.
+     */
+    with?: 'link' | 'fetch';
+    /**
+     * Should prefetch even on data saver mode or slow connection. (default `false`)
+     */
+    ignoreSlowConnection?: boolean;
+    /**
+     * A string providing a hint to the browser as to how eagerly it should prefetch/prerender link targets in order to balance performance advantages against resource overheads. (default `immediate`)
+     * Only works if `clientPrerender` is enabled and browser supports Speculation Rules API.
+     * The browser takes this hint into consideration along with its own heuristics, so it may select a link that the author has hinted as less eager than another, if the less eager candidate is considered a better choice.
+     *
+     * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script/type/speculationrules#eagerness
+     */
+    eagerness?: 'immediate' | 'eager' | 'moderate' | 'conservative';
+}
+/**
+ * Prefetch a URL so it's cached when the user navigates to it.
+ *
+ * @param url A full or partial URL string based on the current `location.href`. They are only fetched if:
+ *   - The user is online
+ *   - The user is not in data saver mode
+ *   - The URL is within the same origin
+ *   - The URL is not the current page
+ *   - The URL has not already been prefetched
+ * @param opts Additional options for prefetching.
+ */
+export declare function prefetch(url: string, opts?: PrefetchOptions): void;
+export {};