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/jiti/lib/jiti.d.cts

@@ -0,0 +1,8 @@
+import * as types from "./types.js";
+declare const allExports: typeof types & {
+  /**
+   * @deprecated Please use `const { createJiti } = require("jiti")` or use ESM import.
+   */
+  (...args: Parameters<typeof types.createJiti>): types.Jiti;
+};
+export = allExports;