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/external.js

@@ -0,0 +1,6 @@
+export * from "./errors.js";
+export * from "./helpers/parseUtil.js";
+export * from "./helpers/typeAliases.js";
+export * from "./helpers/util.js";
+export * from "./types.js";
+export * from "./ZodError.js";