title: Effective way to debug a Google Apps Script Web App
body: <p>I have had some experience writing container-bound scripts, but am totally new to web apps.</p>
  
  <p>How do I debug (e.g. look at variable values, step through code etc) a web app? In a container bound script it was easy, because I could set breakpoints, use the apps script debugger - how do I go about this in a web page e.g. when I execute a <code>doPost</code>?</p>