add: add README

README.md

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+# 🚀 AIC Server
+
+A high-performance backend service built with **Rust**.  
+Easily deployable with **Cargo** or **Docker**, with a built-in Swagger UI for API exploration.
+
+---
+
+## 📦 Build & Run
+
+### 🔨 Option 1: Build with Cargo
+
+```bash
+cargo build --release
+./target/release/aic-server
+```
+
+### 🐳 Option 2: Build with Docker
+
+```bash
+docker build -t aic-server .
+docker run -p 8080:8080 -e DATABASE_URL="your_database_url_here" aic-server
+```
+
+---
+
+## ⚙️ Environment Variables
+
+Before running, make sure to set:
+
+```bash
+export DATABASE_URL="postgres://user:password@localhost:5432/db_name"
+```
+
+This is required for database connectivity.
+
+---
+
+## 📖 API Documentation
+
+After starting the server, you can explore the API via **Swagger UI**:
+
+👉 [http://localhost:8080/swagger-ui](http://localhost:8080/swagger-ui)
+
+---
+
+## 🗂️ Project Structure
+
+```text
+AIC Server/
+├── src/              # Source code
+├── Cargo.toml        # Rust dependencies
+├── Dockerfile        # Container build file
+└── README.md         # You're here
+```
+
+---
+
+## ✅ Features
+
+- ⚡ Fast & memory-safe (built with Rust)
+- 🐳 Dockerized for easy deployment
+- 📚 Interactive Swagger UI
+- 🗄️ PostgreSQL database support
+
+---
+
+## 🤝 Contributing
+
+Contributions, issues, and feature requests are welcome!