Update README.md

README.md

@@ -8,3 +8,30 @@ The `jenkins` directory contains an example of the `Jenkinsfile` (i.e. Pipeline)
 you'll be creating yourself during the tutorial and the `scripts` subdirectory
 contains shell scripts with commands that are executed when Jenkins processes
 the "Test" and "Deliver" stages of your Pipeline.
+
+# Extended Node.js and React Application
+
+This repository contains a simple Node.js and React application which generates a web page with the content "Welcome to React" and is accompanied by a test to check that the application renders satisfactorily.
+
+## Table of Contents
+- [Prerequisites](#prerequisites)
+- [Installation](#installation)
+- [Running the Application](#running-the-application)
+- [Running Tests](#running-tests)
+- [Jenkins Pipeline](#jenkins-pipeline)
+- [Changes Made](#changes-made)
+
+## Prerequisites
+
+Ensure you have the following installed on your local machine:
+
+- [Node.js](https://nodejs.org/) (version 14.x or later)
+- [npm](https://www.npmjs.com/get-npm) (version 6.x or later)
+
+## Installation
+
+Clone the repository to your local machine:
+
+```bash
+git clone https://github.com/your-username/your-repo-name.git
+cd your-repo-name