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/deterministic-object-hash/dist/encoders.d.ts

@@ -0,0 +1,6 @@
+export declare const encoders: {
+    base64: (input: ArrayBuffer) => string;
+    base64url: (input: ArrayBuffer) => string;
+    hex: (input: ArrayBuffer) => string;
+    binary: (input: ArrayBuffer) => string;
+};