index.js

const express = require('express')
const app = express();
const cors = require('cors')
const path = require('path');
const {rateLimit} = require('express-rate-limit');

const limiter = rateLimit({
    windowMs: 15 * 60 * 1000,
    limit: 100,
    standardHeaders: 'draft-7',
    legacyHeaders: false
})

const specificLimiter = rateLimit({
    windowMs: 1 * 60 * 1000, 
    max: 10,
    message: '<b>Too many requests for this route, please try again later.</b>'
  });
  

app.use(limiter);

app.use(express.static('public'));

app.use(cors({
    origin: '*'
}))

let leet = require('./leetcode');
app.get('/', (req, res) => {
    res.sendFile(path.join(__dirname, 'public', 'index.html'));
});
app.get('/:id', specificLimiter, leet.leetcode);

app.listen(3000, () => {
    console.log(`App is running on port 3000`);
});