Update instructions_to_run_generated_code.md

Step-by-step guide on how to run API requests using different libraries and methods in JavaScript and Node.js using fetch and axios on major platforms like macOS, Linux, and Windows.

doc/user_guide/instructions_to_run_generated_code.md

@@ -197,19 +197,160 @@ TODO
 
 ## JavaScript (axios)
 
-TODO
+`Axios` is a promise-based HTTP client for the browser and Node.js.
+### 1. Installation:
+-Ensure Node.js and npm are installed. Verify by running:
+
+```bash
+node --version
+npm --version
+```
+-If not, download from Node.js **[Official Website]((https://nodejs.org/en))**.
+
+-Initialize a new Node.js project:
+
+```bash
+npm init -y
+```
+
+-Install Axios:
+
+```bash
+npm install axios
+```
+
+### 2. Running the Generated Code::
+-Create a new JavaScript file (`e.g., app.js`).
+-Copy and paste the generated code into this file.
+-Open a terminal and navigate to the project directory.
+-Run the script:
+
+```bash
+node app.js
+```
 
 ## JavaScript (fetch)
 
-TODO
+macOS, Linux, and Windows:
+### 1. Node.js:
+-Follow the same steps as above to install Node.js.
+
+### 2. Set Up a New Project:
+-Create a new project folder and navigate into it
+```bash
+mkdir fetch-example
+cd fetch-example
+```
+-Initialize the project:
+```bash
+npm init -y
+```
+
+### 3. Ensure Fetch API Support:
+-Starting with Node.js 18, the Fetch API is built-in. Verify the version:
+
+```bash
+node --version
+```
+
+-If you’re using an earlier version, install a Fetch polyfill:
+
+```bash
+npm install node-fetch
+```
+
+### 4. Create and Run the Code:
+-Save the generated code in a file, e.g., fetch_example.js.
+-If using node-fetch, add this line at the top of your file:
+
+```bash
+const fetch = require('node-fetch');
+```
+
+-Run the code:
+
+```bash
+node fetch_example.js
+```
 
 ## node.js (JavaScript, axios)
 
-TODO
+macOS, Linux, and Windows:
+### 1.Install Node.js:
+-Follow the installation steps above.
+
+### 2.Set Up a New Project:
+-Create a new project directory:
+
+```bash
+mkdir node-axios-example
+cd node-axios-example
+```
+
+-Initialize the project:
+
+```bash
+npm init -y
+```
+
+### 3.Install Axios:
+
+-Install the Axios library:
+
+```bash
+npm install axios
+```
+
+### 4.Create and Run the Code:
+
+-Save the generated code in a file(` e.g., app.js`).
+-Run the code:
+
+```bash
+node app.js
+```
 
 ## node.js (JavaScript, fetch)
 
-TODO
+macOS, Linux, and Windows:
+### 1. Install Node.js:
+-Follow the installation steps above.
+
+### 2. Set Up a New Project:
+Create a project directory:
+
+```bash
+mkdir node-fetch-example
+cd node-fetch-example
+```
+
+### 3.Initialize the project:
+
+```bash
+npm init -y
+```
+
+### 4.Ensure Fetch API Support:
+-If using Node.js 18 or newer, the Fetch API is already built-in.
+-For older versions, install the `node-fetch` package:
+
+```bash
+npm install node-fetch
+```
+
+### 5.Create and Run the Code:
+-Save the generated code in a file( `e.g., app.js`).
+-If using `node-fetch`, add the following line to the top of the file:
+
+```javascript
+const fetch = require('node-fetch');
+```
+
+-Run the file:
+
+```bash
+node app.js
+```
 
 ## Java (asynchttpclient)