fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/prerender/metadata.d.ts

@@ -0,0 +1,8 @@
+import type { ModuleInfo, ModuleLoader } from '../core/module-loader/index.js';
+type GetPrerenderStatusParams = {
+    filePath: URL;
+    loader: ModuleLoader;
+};
+export declare function getPrerenderStatus({ filePath, loader, }: GetPrerenderStatusParams): boolean | undefined;
+export declare function getPrerenderMetadata(moduleInfo: ModuleInfo): any;
+export {};