update README

Author: mazineab

.env.example

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+API_KEY=,
+APP_ID=,
+messagingSenderId=,
+projectId=
+app_url=
+bucket=

README.md

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-# chat_app
+# 📝 Chat App
 
-A new Flutter project.
+A modern chat application built with **Flutter**, **GetX** for state management, and **Firebase** for real-time communication. The app features a sleek UI with a **multi-step signup process, profile management, and real-time chat** with support for images, audio, and text messages.
 
-## Getting Started
+---
 
-This project is a starting point for a Flutter application.
+## ✨ Features
 
-A few resources to get you started if this is your first Flutter project:
+- 🔹 **Multi-step signup** with a beautiful UI
+- 🔹 **Modern dark mode design** for forms, profile, and chat screens
+- 🔹 **Real-time messaging** with users and friends
+- 🔹 **Send & receive images, audio messages, and text**
+- 🔹 **Firebase integration** for seamless chat experience
 
-- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
-- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+---
 
-For help getting started with Flutter development, view the
-[online documentation](https://docs.flutter.dev/), which offers tutorials,
-samples, guidance on mobile development, and a full API reference.
+## 🚀 Tech Stack
+
+- **Flutter** (Cross-platform development)
+- **GetX** (State management)
+- **Firebase** (Real-time database & authentication)
+
+---
+
+## 📸 Screenshots
+<img src="assets/screenshots/login.jpg" width="150"/> <img src="assets/screenshots/signup.jpg" width="150"/>  <img src="assets/screenshots/signup2.jpg" width="150"/> 
+
+<img src="assets/screenshots/profile.jpg" width="150"/> <img src="assets/screenshots/chat_screen.jpg" width="150"/>  <img src="assets/screenshots/conversations.jpg" width="150"/> 
+
+---
+
+## 📥 Installation
+
+1. **Clone the repository**
+   ```sh
+   git clone https://github.com/mazineab/flutter_chat_app.git
+### 2️⃣ **Set up Firebase**
+1. Go to the [Firebase Console](https://console.firebase.google.com/) and create a **new project**.
+2. Enable **Firebase services**:
+   - **Firebase Authentication**
+   - **Cloud Firestore**
+3. Download the `google-services.json` and place it in the `android/app` folder.
+
+### 3️⃣ **Set up Environment Variables**
+1. Rename the `.env.example` file to `.env`
+2. Add your Firebase API keys, project ID, and other credentials.