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/astro/dist/assets/fonts/runtime.js

@@ -0,0 +1,5 @@
+import * as fontsMod from "virtual:astro:assets/fonts/internal";
+const fontData = fontsMod.fontDataByCssVariable ?? {};
+export {
+  fontData
+};