add logging

lib/crawler.js

@@ -1,6 +1,7 @@
 const puppeteer = require('puppeteer')
 
 const crawl = async (url) => {
+  console.log(`crawl started for URL ${url}`)
   const browser = await puppeteer.launch()
   const page = await browser.newPage()
   await page.goto(url)
@@ -9,6 +10,8 @@ const crawl = async (url) => {
 
   await browser.close()
 
+  console.log(`crawl finished for URL ${url}`)
+
   return html
 }