server.js

const express = require('express');
const cors = require('cors');
require('dotenv').config()
const PORT = 8000;
const app = express();

app.use(express.json())
app.use(cors())

const API_KEY = process.env.API_KEY;

app.post('/completions', async(req, res) => {
    const options = {
        method:'POST',
        headers: {
            "Authorization":`Bearer ${API_KEY}`,
            "Content-Type": 'application/json'
        },
        body:JSON.stringify({
            model:'gpt-3.5-turbo',
            messages:[{
                role:'user',
                content:req.body.message
            }],
            max_tokens:100,
        })
    }
    try {
        const response = await fetch('https://api.openai.com/v1/chat/completions', options);
        const data = await response.json()
        res.send(data)
    } catch(err) {
        console.error(err)
    }
})

app.listen(PORT, () => console.log('Server is running on PORT ' + PORT ))