Update README.md

README.md

@@ -1,4 +1,3 @@
-[README.md](https://github.com/user-attachments/files/22389320/README.md)
 # 📚 Book-Repo
 *Empowering Discovery, Simplifying Your Book Journey*
 
@@ -9,7 +8,31 @@
 
 ---
 
-## 📖 Overview  
+## 📖 Overview
+
+
+## 🛠 Technology Stack  
+| Technology              | Version   |
+|--------------------------|-----------|
+| Java                    | 17        |
+| Spring Boot             | 3.3.3     |
+| Spring Security         | bundled   |
+| Spring Data JPA         | bundled   |
+| Spring Validation       | bundled   |
+| Springdoc OpenAPI       | 2.1.0     |
+| Liquibase               | latest    |
+| MapStruct               | 1.5.5.Final |
+| Lombok                  | 1.18.36   |
+| JWT (jjwt)              | 0.11.5    |
+| Hibernate Validator     | bundled   |
+| MySQL Connector/J       | 8.4.0 / 8.0.33 |
+| Docker Compose Support  | 3.1.1     |
+| Testcontainers (core)   | 1.19.0    |
+| Testcontainers BOM      | 1.21.3    |
+| JUnit (Spring Boot Test)| bundled   |
+| Maven Compiler Plugin   | 3.3.0+    |
+| Maven Checkstyle Plugin | 3.3.0     |
+
 **Book-Repo** is a full-featured **online book store application** built with **Java & Spring Boot**.  
 It demonstrates best practices for modern backend development: modular architecture, containerized deployment, and comprehensive testing.  
 
@@ -85,17 +108,41 @@ docker run -it book-repo mvn test
 ## 📂 Project Structure  
 ```
 book-repo/
- ├── src/               # Source code (controllers, services, repositories, configs)
- ├── resources/         # Application configuration & Liquibase migrations
- ├── Dockerfile         # Docker image build
- ├── docker-compose.yml # Containerized environment setup
- └── pom.xml            # Maven project descriptor
+ ├── src/
+ │   ├── main/java/com/bookrepo/
+ │   │   ├── controller/       # REST controllers (BookController, OrderController, CartController, AuthController)
+ │   │   ├── dto/              # Data Transfer Objects (BookDTO, UserDTO, OrderDTO, etc.)
+ │   │   ├── entity/           # JPA entities (Book, User, Role, Cart, Order, OrderItem)
+ │   │   ├── repository/       # Spring Data repositories for each entity
+ │   │   ├── service/          # Business logic (BookService, OrderService, CartService, UserService)
+ │   │   ├── security/         # JWT configuration, filters, role-based access
+ │   │   └── config/           # Spring and application configuration
+ │   └── test/java/com/bookrepo/
+ │       ├── controller/       # Controller layer tests
+ │       ├── service/          # Unit tests for business logic
+ │       └── repository/       # Database integration tests with Testcontainers
+ ├── resources/
+ │   ├── db/changelog/         # Liquibase migration scripts
+ │   ├── application.yml       # Spring Boot configuration
+ │   └── logback.xml           # Logging configuration
+ ├── docs/
+ │   ├── model-diagram.png     # Entity-Relationship diagram
+ │   └── postman/              # Postman collections for API testing
+ ├── Dockerfile                # Docker image build
+ ├── docker-compose.yml        # Containerized environment setup
+ └── pom.xml                   # Maven project descriptor
 ```
 
+### 🗃 Domain Model  
+- **Book**: stores information about title, author, genre, price, stock, etc.  
+- **User**: application users with roles (ADMIN, CUSTOMER).  
+- **Role**: defines permissions for users.  
+- **Cart**: holds items selected by a user before checkout.  
+- **Order**: finalized purchase with order items, status, and total price.  
+- **OrderItem**: association between books and orders with quantity & price.
 ---
 
-## 🗺 Roadmap  
-- [ ] Implement book search with filters (author, genre, price)  
+## 🗺 Roadmap   
 - [ ] Add payment integration (Stripe/PayPal)  
 - [ ] Improve admin panel for managing books and users  
 - [ ] Deploy CI/CD pipeline with GitHub Actions