How to create a stock Price API

const puppeteer = require("puppeteer");
const express = require("express");
const cron = require("node-cron");
 
const app = express();
 
app.use(express.json());
 
cron.schedule("* * * * *", async () => {
  console.log("cron working");
  await scrapeChannel("https://groww.in/markets/top-losers?index=GIDXNIFTY100");
});
 
var stockApi;
 
async function scrapeChannel(url) {
  // init function with to be scraped url argument
 
  const browser = await puppeteer.launch(); // launch puppeteer
  const page = await browser.newPage(); // generate a headless browser
  await page.goto(url); // open argument passed url
 
  const [el] = await page.$x(
    "/html/body/div/div/div[2]/div[2]/div/div/div[1]/div/div/table/tbody/tr[1]/td[1]/a"
  ); // select specific element on the url fetched page with 'xpath' & assign it to el
  const text = await el.getProperty("textContent"); // choose type of data needed
  const name = await text.jsonValue(); // extract the data type
 
  const [el2] = await page.$x(
    "/html/body/div[1]/div/div[2]/div[2]/div/div/div[1]/div/div/table/tbody/tr[1]/td[3]/text()"
  );
  const priceSrc = await el2.getProperty("textContent");
  const priceVal = await priceSrc.jsonValue();
 
  const [el3] = await page.$x(
    "/html/body/div[1]/div/div[2]/div[2]/div/div/div[1]/div/div/table/tbody/tr[1]/td[5]"
  );
  const highSrc = await el3.getProperty("textContent");
  const highVal = await highSrc.jsonValue();
 
  const [el4] = await page.$x(
    "/html/body/div/div/div[2]/div[2]/div/div/div[1]/div/div/table/tbody/tr[1]/td[4]"
  );
  const lowSrc = await el4.getProperty("textContent");
  const lowVal = await lowSrc.jsonValue();
 
  const [el5] = await page.$x(
    "/html/body/div/div/div[2]/div[2]/div/div/div[1]/div/div/table/tbody/tr[1]/td[3]/div"
  );
  const downBy = await el5.getProperty("textContent");
  const downVal = await downBy.jsonValue();
 
  stockApi = {
    stocksName: name,
    currentPrice: priceVal,
    lowPrice: lowVal,
    highPrice: highVal,
    downBy: downVal
  };
  console.log(stockApi);
  browser.close(); // close the temporary headless browser
}
 
scrapeChannel("https://groww.in/markets/top-losers?index=GIDXNIFTY100");
 
app.get("/", (req, res) => {
  res.send(stockApi);
});
 
const port = process.env.PORT || 3000;
 
app.listen(port, () => {
  console.log(`server started at port ${port}`);
});