fix(academy-challenge): mention Playwright and residential proxies (#876

)

sources/academy/webscraping/web_scraping_for_beginners/challenge/index.md

@@ -83,4 +83,6 @@ Each of the items in the dataset will represent a scraped offer, and will have t
 
 From this course, you should have all the knowledge to build this scraper by yourself. Give it a try, then come back to compare your scraper with our solution.
 
+The challenge can be completed using either [CheerioCrawler](https://crawlee.dev/api/cheerio-crawler/class/CheerioCrawler) or [PlaywrightCrawler](https://crawlee.dev/api/playwright-crawler/class/PlaywrightCrawler). Playwright is significantly slower but doesn't get blocked as much. You will learn the most by implementing both.
+
 Let's start off this section easy by [initializing and setting up](./initializing_and_setting_up.md) our project with the Crawlee CLI (don't worry, no additional install is required).

sources/academy/webscraping/web_scraping_for_beginners/challenge/initializing_and_setting_up.md

@@ -33,6 +33,12 @@ const { keyword } = await KeyValueStore.getInput();
 
 const crawler = new CheerioCrawler({
     requestHandler: router,
+
+    // If you have access to Apify Proxy, you can use residential proxies and
+    // high retry count which helps with blocking
+    // If you don't, your local IP address will likely be fine for a few requests if you scrape slowly.
+    // proxyConfiguration: await Actor.createProxyConfiguration({ groups: ['RESIDENTIAL'] }),
+    // maxRequestRetries: 10,
 });
 
 log.info('Starting the crawl.');