Update: Added nodemon and SwaggerJS

Author: hoangsonww

.idea/swagger-settings.xml

@@ -20,11 +20,13 @@ Welcome to **Fusion Electronics**, a **MERN-Stack E-commerce Application**! This
 8. [Running the Application](#running-the-application)
 9. [Testing the APIs](#testing-the-apis)
 10. [Swagger API Documentation](#swagger-api-documentation)
-11. [Deployment](#deployment)
-12. [Containerization](#containerization)
-13. [Contributing](#contributing)
-14. [License](#license)
-15. [Creator](#creator)
+11. [OpenAPI Specification](#openapi-specification)
+    - [Using the `openapi.yaml` File](#using-the-openapiyaml-file)
+12. [Deployment](#deployment)
+13. [Containerization](#containerization)
+14. [Contributing](#contributing)
+15. [License](#license)
+16. [Creator](#creator)
 
 ## Introduction
 
@@ -307,6 +309,56 @@ Before running this project, ensure you have the following installed:
     <img src="docs/swagger-ui.png" alt="The MovieVerse App Interface" style="border-radius: 10px" width="100%"/>
 </p>
 
+## OpenAPI Specification
+
+### Using the `openapi.yaml` File
+
+1. **View the API Documentation**
+- Open [Swagger Editor](https://editor.swagger.io/).
+- Upload the `openapi.yaml` file or paste its content.
+- Visualize and interact with the API documentation.
+
+2. **Test the API**
+- Import `openapi.yaml` into [Postman](https://www.postman.com/):
+  - Open Postman → Import → Select `openapi.yaml`.
+  - Test the API endpoints directly from Postman.
+- Or use [Swagger UI](https://swagger.io/tools/swagger-ui/):
+  - Provide the file URL or upload it to view and test endpoints.
+
+3. **Generate Client Libraries**
+- Install OpenAPI Generator:
+  ```bash
+  npm install @openapitools/openapi-generator-cli -g
+  ```
+- Generate a client library:
+  ```bash
+  openapi-generator-cli generate -i openapi.yaml -g <language> -o ./client
+  ```
+- Replace `<language>` with the desired programming language.
+
+4. **Generate Server Stubs**
+- Generate a server stub:
+  ```bash
+  openapi-generator-cli generate -i openapi.yaml -g <framework> -o ./server
+  ```
+- Replace `<framework>` with the desired framework.
+
+5. **Run a Mock Server**
+- Install Prism:
+  ```bash
+  npm install -g @stoplight/prism-cli
+  ```
+- Start the mock server:
+  ```bash
+  prism mock openapi.yaml
+  ```
+
+6. **Validate the OpenAPI File**
+- Use [Swagger Validator](https://validator.swagger.io/):
+  - Upload `openapi.yaml` or paste its content to check for errors.
+
+This guide enables you to view, test, and utilize the API. You can generate client libraries, server stubs, and run a mock server using the OpenAPI Specification.
+
 ## Deployment
 
 To deploy the application: