To launch the application follow the steps:

1. Install Node.js and npm: If you haven't already, make sure you have Node.js and npm installed on your machine. You can download them from the official Node.js website: https://nodejs.org. The project is made on Node v16.17.0 and npm v8.15.0 but may try newer versions

2. Install Dependencies: In your project directory, run the following command to install the required packages:

   npm install

3. Set Environment Variables: Open your terminal and set your OpenAI API key as an environment variable. Replace 'YOUR_OPENAI_API_KEY' with your actual OpenAI API key.

   For Unix-like systems (Linux, macOS):

   export OPENAI_API_KEY=YOUR_OPENAI_API_KEY

   For Windows (Command Prompt):

   set OPENAI_API_KEY=YOUR_OPENAI_API_KEY

   For Windows (PowerShell):

   $env:OPENAI_API_KEY="YOUR_OPENAI_API_KEY"

4. Run the Application: To run the application, in your terminal, run the following command:

   npm start

5. Access the Application: Once the server is running, you can access the application by opening your web browser and navigating to http://localhost:3000. This should display the form where you can input a sentence. After submitting the form, the corrected sentence should be displayed below the form.

6. Test Endpoints: You can also test the different endpoints using tools like cURL or a tool like Postman. Here are some example requests:

   • To fetch random sentence:

     curl http://localhost:3000/random

   • To fetch all corrections from the database:

     curl http://localhost:3000/corrections

7. Cleanup: If you're done testing, you can stop the application by pressing Ctrl + C in your terminal.

That's it! With these steps, you should be able to launch and test the application.