Use saveJsonToDisk in main func

be/src/main.ts

@@ -1,4 +1,5 @@
 import { fetchFromApi } from "./fetchItemsFromJellyfin.ts";
+import { saveJsonToDisk } from "./fsHelper.ts";
 import { transformItems } from "./itemHelper.ts";
 
 interface JellyfinApiResponse {
@@ -18,7 +19,8 @@ const run = async () => {
   console.log("transformedItems:", transformedItems);
   console.log("totalItemCount:", totalItemCount);
 
-  // write to db file
+  saveJsonToDisk({ totalItemCount, items: transformedItems });
+
   // update db file
 }