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/zod/v3/locales/en.d.ts

@@ -0,0 +1,3 @@
+import { type ZodErrorMap } from "../ZodError.js";
+declare const errorMap: ZodErrorMap;
+export default errorMap;