Hxni786/Hxnix-Social-Media-App ? reverse-engineered prompt

Build me a mobile social feed app called HXNIX that lets people browse posts, open a single post, create a new post, and delete posts they no longer want.

I want it to feel polished and fast on a phone, with a clean feed screen, simple post detail view, and an easy form for adding a post with a title, body, and user id. Please also include a basic backend so the app can talk to a database, save posts, and load them back again when the app opens. If it makes sense, add a simple health check route too so I can tell the server is running.

Use the existing project setup and make it work end to end, and look up the current Expo and React Native docs online if you need to. Keep it ready to run locally, with clear setup steps for the backend and the mobile app.