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/unstorage/drivers/utils/node-fs.d.ts

@@ -0,0 +1,11 @@
+import { Dirent, promises as fsPromises } from "node:fs";
+type WriteFileData = Parameters<typeof fsPromises.writeFile>[1];
+export declare function writeFile(path: string, data: WriteFileData, encoding?: BufferEncoding): Promise<void>;
+export declare function readFile(path: string, encoding?: BufferEncoding): Promise<any>;
+export declare function stat(path: string): Promise<any>;
+export declare function unlink(path: string): Promise<any>;
+export declare function readdir(dir: string): Promise<Dirent[]>;
+export declare function ensuredir(dir: string): Promise<void>;
+export declare function readdirRecursive(dir: string, ignore?: (p: string) => boolean, maxDepth?: number): Promise<string[]>;
+export declare function rmRecursive(dir: string): Promise<void>;
+export {};