How can I launch a single process of puppeteer.launch() and just send pages to it in Node?

The following code runs on every one of my requests and I’m afraid that it’s trying to launch the browser every time and causing server issues on Heroku. I want to launch puppeteer like a Singleton instance where I only launch it once and then after that my requests will just trigger browser.newPage(). I’m not experienced in JS to resolve this.

 (async () => {
      const browser = await puppeteer.launch({ headless: true});
      const page = await browser.newPage();    

      await page.on('response', interceptedResponse =>{
        let status = interceptedResponse.status();
        interceptedResponse.text()
          .then((text) => {          
            handleResponse(text)
            browser.close();
          })
          .catch(err => {
            console.error(`interceptedResponse error: ${err}`)
            browser.close();
          });
      });

      await page.goto(url);
    })();