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/hast-util-is-element/index.d.ts

@@ -0,0 +1,4 @@
+export type Check = import('./lib/index.js').Check;
+export type Test = import('./lib/index.js').Test;
+export type TestFunction = import('./lib/index.js').TestFunction;
+export { convertElement, isElement } from "./lib/index.js";