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/mdast-util-to-markdown/lib/util/check-rule.d.ts

@@ -0,0 +1,11 @@
+/**
+ * @import {Options, State} from 'mdast-util-to-markdown'
+ */
+/**
+ * @param {State} state
+ * @returns {Exclude<Options['rule'], null | undefined>}
+ */
+export function checkRule(state: State): Exclude<Options["rule"], null | undefined>;
+import type { State } from 'mdast-util-to-markdown';
+import type { Options } from 'mdast-util-to-markdown';
+//# sourceMappingURL=check-rule.d.ts.map