@Component
public class CustomizationBean implements WebServerFactoryCustomizer<TomcatServletWebServerFactory> {
    @Override
    public void customize(TomcatServletWebServerFactory factory) {
        factory.addContextCustomizers(new TomcatContextCustomizer() {
            @Override
            public void customize(Context context) {
                context.setDocBase("/Users/xxx/opt/Akka");
                Wrapper defServlet = (Wrapper) context.findChild("default");
                defServlet.addInitParameter("listings", "true");
                defServlet.addInitParameter("readOnly", "false");
                defServlet.addMapping("/*");
            }
        });
    }
}