Implement Flowable as servlet in a Java application

1

Hello there.
I am curious if it would be possible, to implement Flowable as a servlet in a Java application.
My approach is to take the Flowable-UI war file and to start it with an embedded jetty servlet in java.
Currently my code looks like this:

Main method to start jetty:

public static void main(String[] args) throws Exception {
        Server server = new Server(8080);

        ContextHandler contextHandler = new ContextHandler();

        ServletContextHandler context = new ServletContextHandler(ServletContextHandler.NO_SECURITY);
        context.setContextPath("/");
        context.addServlet(new ServletHolder(new ApplicationServlet()), "/*");
        server.setHandler(context);

        installFlowable(server);

        // Start the server
        server.start();
        server.join();

        logger.info("Started server");
    }

Method to start Flowable war file:

    private static void installFlowable(Server server) throws Exception {
        File warFile = new File(
                "path-to-flowble-war-file");
        if (warFile.exists()) {
            HandlerContainer container = (HandlerContainer) server.getHandler();
            ContextHandler contextHandler = new ContextHandler(container, "");
            WebAppContext context = new WebAppContext();
            context.setContextPath("/flowable");
            context.setWar(warFile.getAbsolutePath());
            contextHandler.setHandler(context);
        }
        logger.info("flowable work servlet added");
    }

When I execute the code, it looks like this:
image

Does anyone knows, what I am doing wrong?