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/zod.js

@@ -0,0 +1,7 @@
+import * as mod from "zod";
+export * from "zod";
+var zod_default = mod;
+export {
+  zod_default as default,
+  mod as z
+};