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-to-json-schema/postesm.ts

@@ -0,0 +1,3 @@
+import { writeFileSync } from "fs";
+
+writeFileSync("./dist/esm/package.json", '{"type":"module","main":"index.js"}', "utf-8");