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/trim-lines/index.d.ts

@@ -0,0 +1,10 @@
+/**
+ * Remove initial and final spaces and tabs at the line breaks in `value`.
+ * Does not trim initial and final spaces and tabs of the value itself.
+ *
+ * @param {string} value
+ *   Value to trim.
+ * @returns {string}
+ *   Trimmed value.
+ */
+export function trimLines(value: string): string