Here's a short README.md for your script:

ChatGPT API Express Server

This project is an Express.js server that integrates with OpenAI's ChatGPT API, allowing you to send a message to the API and receive a response via an HTTP endpoint.

Setup

1. Clone the repository.

2. Install dependencies:

   $ npm install

3. Create a .env file and add your OpenAI API key:

   OPENAI_API_KEY=your-openai-api-key-here

4. Start the server:

   $ node scripts/chat.js

The server will start on port 3327.

Usage

To send a message to ChatGPT, make a POST request to the /chat endpoint with the following format:

Request:

curl -X POST http://localhost:3327/chat \
    -H "Content-Type: application/json" \
    -d '{"message": "Tell me about Ethereum."}'

Response:

The server will return a JSON object with the ChatGPT response, for example:

{
  "response": "Ethereum is a decentralized, open-source blockchain platform..."
}

Error Handling

• If the message field is missing in the request body, the server will return a 400 Bad Request error.
• If the API request to OpenAI fails, a 500 Internal Server Error is returned.