fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/unstorage/drivers/vercel-runtime-cache.d.mts

@@ -0,0 +1,17 @@
+import type { RuntimeCache } from "@vercel/functions";
+export interface VercelCacheOptions {
+    /**
+     * Optional prefix to use for all keys. Can be used for namespacing.
+     */
+    base?: string;
+    /**
+     * Default TTL for all items in seconds.
+     */
+    ttl?: number;
+    /**
+     * Default tags to apply to all cache entries.
+     */
+    tags?: string[];
+}
+declare const _default: (opts: VercelCacheOptions) => import("..").Driver<VercelCacheOptions, RuntimeCache>;
+export default _default;