title: Parameter passing to webapp on doGet(e)
body: <p>I'm trying to figure out how parameters in URL are passed to <code>doGet()</code> function.
  I tried to do </p>
  
  <p><code>https://script.google.com/a/macros/[my domain].com/s/[some random string generated by GAS]</code> followed by <code>"&amp;variable=data"</code></p>
  
  <p>but it only gave me this error:
  <em>"Sorry, the file you have requested does not exist."</em></p>
  
  <p>FYI, <code>https://script.google.com/a/macros/[my domain].com/s/[some random string generated by GAS]</code> works well without <code>"&amp;variable=data".</code></p>