This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The structure of a J2EE web application is the same regardless of which tool you're using to administer it. If your Internet Service Provider told you to create a WEB-INF directory in a particular place, I would tend to believe them and do as they tell you.