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/remark-gfm/lib/index.d.ts

@@ -0,0 +1,12 @@
+/**
+ * Add support GFM (autolink literals, footnotes, strikethrough, tables,
+ * tasklists).
+ *
+ * @param {Options | null | undefined} [options]
+ *   Configuration (optional).
+ * @returns {undefined}
+ *   Nothing.
+ */
+export default function remarkGfm(options?: Options | null | undefined): undefined;
+import type { Options } from 'remark-gfm';
+//# sourceMappingURL=index.d.ts.map