web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
    <env-entry>
        <env-entry-name>injectedResource</env-entry-name>
        <env-entry-type>java.lang.Integer</env-entry-type>
        <env-entry-value>42</env-entry-value>
    </env-entry>
    <filter>
        <filter-name>HeaderFilter</filter-name>
        <filter-class>org.eclipse.jetty.servlets.HeaderFilter</filter-class>
        <init-param>
            <param-name>headerConfig</param-name>
            <param-value>
                set X-Frame-Options: SAMEORIGIN
            </param-value>
        </init-param>
    </filter>
    
</web-app>