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/micromark-extension-gfm-task-list-item/index.d.ts

@@ -0,0 +1,17 @@
+export {gfmTaskListItemHtml} from './lib/html.js'
+export {gfmTaskListItem} from './lib/syntax.js'
+
+/**
+ * Augment types.
+ */
+declare module 'micromark-util-types' {
+  /**
+   * Token types.
+   */
+  interface TokenTypeMap {
+    taskListCheck: 'taskListCheck'
+    taskListCheckMarker: 'taskListCheckMarker'
+    taskListCheckValueChecked: 'taskListCheckValueChecked'
+    taskListCheckValueUnchecked: 'taskListCheckValueUnchecked'
+  }
+}