fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/unstorage/drivers/mongodb.d.ts

@@ -0,0 +1,23 @@
+import { type Collection, type MongoClientOptions } from "mongodb";
+export interface MongoDbOptions {
+    /**
+     * The MongoDB connection string.
+     */
+    connectionString: string;
+    /**
+     * Optional configuration settings for the MongoClient instance.
+     */
+    clientOptions?: MongoClientOptions;
+    /**
+     * The name of the database to use.
+     * @default "unstorage"
+     */
+    databaseName?: string;
+    /**
+     * The name of the collection to use.
+     * @default "unstorage"
+     */
+    collectionName?: string;
+}
+declare const _default: (opts: MongoDbOptions) => import("..").Driver<MongoDbOptions, Collection<import("mongodb").Document>>;
+export default _default;