Update Readme

Author: SelmaGuedidi

README.md

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+# Spring Boot WebFlux Microservice with MongoDB
+
+## Overview
+This microservice is built using **Spring Boot** and **Spring WebFlux** to provide an asynchronous, non-blocking REST API. It interacts with a **MongoDB NoSQL database** to store and retrieve product information.
+
+## Features
+- Retrieve products by **EAN code**.
+- Retrieve a product by **EAN code and Store ID**.
+- Uses **Spring Data Reactive MongoDB** for database interactions.
+- Asynchronous handling with **Spring WebFlux**.
+- Includes **unit tests** with JUnit 5 and Mockito.
+
+## Technologies Used
+- Java 17
+- Spring Boot 3
+- Spring WebFlux
+- Spring Data MongoDB (Reactive)
+- MongoDB
+- JUnit 5 & Mockito (for testing)
+- Maven
+
+## API Endpoints
+
+### 1. Get all products with a specific EAN
+**Request:**
+```sh
+GET /products/ean/{ean}
+```
+**Example:**
+```sh
+curl -X GET "http://localhost:8080/products/ean/123456789" -H "Content-Type: application/json"
+```
+### 2. Get a product by EAN and Store ID
+**Request:**
+```sh
+GET /products/ean/{ean}/store/{storeId}
+```
+**Example:**
+```sh
+curl -X GET "http://localhost:8080/products/ean/123456789/store/1" -H "Content-Type: application/json"
+```
+## Installation & Setup
+### 1. Clone the repository
+```sh
+git clone https://github.com/selmaguedidi/springreactiveproject.git
+```
+### 2. Start MongoDB
+   Ensure MongoDB is running locally or update application.properties to connect to a remote MongoDB instance.
+
+### 3. Build & Run the Application
+```sh
+mvn clean install
+mvn spring-boot:run
+```
+The application will start on http://localhost:8080.
+
+## Running Tests
+```sh
+mvn test
+```