added a debug arg.

main.js

@@ -31,7 +31,7 @@ const fs = require('fs');
             process.exit(12);
         }
         
-        const browser = await puppeteer.launch({headless: true, args: ['--no-sandbox']});
+        const browser = await puppeteer.launch({headless: true, dumpio: true, args: ['--no-sandbox']});
         const page = await browser.newPage();
         page.on('requestfailed', function(request)
         {