To serve purely static content, the Jetty Deployment Descriptor XML concepts and the internal ResourceHandler can be used. Create a file called scratch.xml in the ${jetty.base}/webapps directory and paste the following file contents in it.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd">
<Configure class="org.eclipse.jetty.server.handler.ContextHandler">
  <Set name="contextPath">/scratch</Set>
  <Set name="handler">
    <New class="org.eclipse.jetty.server.handler.ResourceHandler">
      <Set name="resourceBase">/home/jesse/scratch</Set>
      <Set name="directoriesListed">true</Set>
    </New>
  </Set>
</Configure>

This is a very basic setup for serving static files. For advanced static file serving, use the DefaultServlet.