Create README.md

README.md

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+# E-Commerce Serang (Android App)
+
+A mobile e-commerce platform built with **Kotlin** (Android) and a backend in **Express**, tailored for small businesses (UMKM). Supports browsing, ordering, chatting, and tracking — with **shipping cost calculation (RajaOngkir)** and **push notifications** via Firebase Cloud Messaging.
+
+---
+
+## Overview
+
+This Android app includes:
+
+- Account registration, login, and OTP verification
+- Browsing products by category and store
+- Cart and checkout orders
+- Shipping cost estimation via RajaOngkir API
+- Checkout order, tracking, and status updates
+- Real-time buyer–seller chat
+- Store registration and product management
+- Store Balance as active status
+- Top up store balance
+- Write rating and feedback for purchased products
+- Push notifications for user activity
+
+The app communicates with a custom backend server via REST API and WebSocket. The backend service is currently private and tailored for this project.
+
+---
+
+## Project Structure
+app/
+├── src/
+│   └── main/
+│       ├── java/com/yourappname/
+│       │   ├── api/
+│       │   │   └── retrofit/           # ApiService.kt, Retrofit client setup
+│       │   ├── data/
+│       │   │   ├── dto/               
+│       │   │   ├── response/           
+│       │   │   └── repository/         
+│       │   ├── di/                     # Hilt dependency injection modules
+│       │   ├── ui/
+│       │   │   ├── auth/               # Login, register, OTP verification
+│       │   │   ├── home/               
+│       │   │   ├── cart/               
+│       │   │   ├── order/              # Order history, detail, and status
+│       │   │   ├── chat/               
+│       │   │   ├── profile/            
+│       │   │   └── product/            
+|       |   |   └── notif/              # Socket.IO client setup and event handling
+│       │   ├── utils/                  
+│       │   └── App.kt                 
+│       └── res/
+│           ├── layout/                
+│           ├── drawable/               
+│           ├── values/                 
+│           └── navigation/             
+├── google-services.json                # Firebase config for push notifications
+
+## How to Run
+
+1. Clone this project and open it in Android Studio
+2. Add your `google-services.json` for Firebase (FCM)
+3. Update the API base URL in the Retrofit client
+5. Settings BASE_URL in your local.properties
+4. Build and run on an emulator or physical device
+
+---
+