fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/dist/assets/fonts/infra/fs-font-file-content-resolver.d.ts

@@ -0,0 +1,10 @@
+import type { FontFileContentResolver } from '../definitions.js';
+type ReadFileSync = (path: string) => string;
+export declare class FsFontFileContentResolver implements FontFileContentResolver {
+    #private;
+    constructor({ readFileSync }: {
+        readFileSync: ReadFileSync;
+    });
+    resolve(url: string): string;
+}
+export {};