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/rehype-raw/lib/index.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Parse the tree (and raw nodes) again, keeping positional info okay.
+ *
+ * @param {Options | null | undefined}  [options]
+ *   Configuration (optional).
+ * @returns
+ *   Transform.
+ */
+export default function rehypeRaw(options?: Options | null | undefined): (tree: Root, file: VFile) => Root;
+export type Root = import('hast').Root;
+export type RawOptions = import('hast-util-raw').Options;
+export type VFile = import('vfile').VFile;
+/**
+ * Configuration.
+ */
+export type Options = Omit<RawOptions, 'file'>;