docs: add Happy Little Monoliths to resources (#298)

Author: galvez

src/pages/resources.mdx

@@ -10,6 +10,10 @@ If you're looking for an in-depth resource to learn Fastify, consider this book:
 
 - [Accelerating Server-Side Development with Fastify: A comprehensive guide to API development for building a scalable backend for your web apps](https://www.packtpub.com/product/accelerating-server-side-development-with-fastify/9781800563582)
 
+For a comprehensive guide into Fastify frontend integration, consider this book:
+
+- [Happy Little Monoliths: Build and deploy full stack Node.js applications with Fastify and Vite](https://hire.jonasgalvez.com.br/happy-little-monoliths)
+
 ## Demo
 
 If learning is most effective through reading code: