IPhone Chatting App Sample

I want a minimal basic chat sample source. The IPhone (client side) should be created using the NodeJS library. Server side server programming should use NodeJS. summary 1. Client Programming (IPHONE) A. Chatting App (Simple, Minimal, Sample Level) B. Use NodeJS Library 2. Server Programming (Linux, NodeJS) A. Use NodeJS B. Do not use the database P.S I developed a chat app on NodeJS on Android. But I'm new to iPhone development. I want to study with a chat app sample. I want you to make it easy.