fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/vite-plugin-utils/index.d.ts

@@ -0,0 +1,20 @@
+import type { AstroConfig } from '../types/public/config.js';
+export declare function getFileInfo(id: string, config: AstroConfig): {
+    fileId: string;
+    fileUrl: string | undefined;
+};
+/**
+ * Normalizes different file names like:
+ *
+ * - /@fs/home/user/project/src/pages/index.astro
+ * - /src/pages/index.astro
+ *
+ * as absolute file paths with forward slashes.
+ */
+export declare function normalizeFilename(filename: string, root: URL): string;
+export declare function cleanUrl(url: string): string;
+/**
+ * Detect `?url`, `?raw`, and `?direct`, in which case we usually want to skip
+ * transforming any code with this queries as Vite will handle it directly.
+ */
+export declare function hasSpecialQueries(id: string): boolean;