fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/assets/fonts/infra/cached-font-fetcher.d.ts

@@ -0,0 +1,11 @@
+import type { FontFetcher, Storage } from '../definitions.js';
+import type { FontFileData } from '../types.js';
+export declare class CachedFontFetcher implements FontFetcher {
+    #private;
+    constructor({ storage, fetch, readFile, }: {
+        storage: Storage;
+        fetch: (url: string, init?: RequestInit) => Promise<Response>;
+        readFile: (url: string) => Promise<Buffer>;
+    });
+    fetch({ id, url, init }: FontFileData): Promise<Buffer>;
+}