<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
  <threadsafe>false</threadsafe>
  <sessions-enabled>true</sessions-enabled>
  <runtime>java8</runtime>
  <static-files>
    <!-- prevent unwanted caching when accessing via the web preview server -->
    <include path="/**" expiration="0s" />
  </static-files>
</appengine-web-app>

Add App Engine dependency file
Add App Engine dependency file
