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/p-queue/dist/queue.d.ts

@@ -0,0 +1,8 @@
+export type RunFunction = () => Promise<unknown>;
+export type Queue<Element, Options> = {
+    size: number;
+    filter: (options: Readonly<Partial<Options>>) => Element[];
+    dequeue: () => Element | undefined;
+    enqueue: (run: Element, options?: Partial<Options>) => void;
+    setPriority: (id: string, priority: number) => void;
+};