Update working-with-files@wEK77A6MPQBCBUSJKMiaY.md

Add official File system page in the Node.js documentation

src/data/roadmaps/nodejs/content/working-with-files@wEK77A6MPQBCBUSJKMiaY.md

@@ -4,5 +4,6 @@ You can programmatically manipulate files in Node.js with the built-in `fs` modu
 
 Visit the following resources to learn more:
 
+- [@official@File system](https://nodejs.org/docs/latest/api/fs.html)
 - [@article@How To Work with Files using the fs Module in Node.js](https://www.digitalocean.com/community/tutorials/how-to-work-with-files-using-the-fs-module-in-node-js)
 - [@feed@Explore top posts about Node.js](https://app.daily.dev/tags/nodejs?ref=roadmapsh)