Spring Boot (embedded) and JSPs - Remove the last web.xml remnants

Spring Boot and JSPs

...
public class DevNexusApplication implements EmbeddedServletContainerCustomizer {
  ...
  @Override
  public void customize(ConfigurableEmbeddedServletContainer container) {
    if(container instanceof TomcatEmbeddedServletContainerFactory) {
      final TomcatEmbeddedServletContainerFactory tomcatEmbeddedServletContainerFactory
          = (TomcatEmbeddedServletContainerFactory) container;

      tomcatEmbeddedServletContainerFactory.addContextCustomizers(
        new TomcatContextCustomizer() {
          @Override
          public void customize(Context context) {
            context.addWelcomeFile("index.jsp");

            final ErrorPage throwableErrorPage = new ErrorPage();
            throwableErrorPage.setExceptionType("java.lang.Throwable");
            throwableErrorPage.setLocation("/WEB-INF/jsp/error/error.jsp");

            final ErrorPage errorPage403 = new ErrorPage();
            errorPage403.setErrorCode(403);
            errorPage403.setLocation("/WEB-INF/jsp/error/403.jsp");

            final ErrorPage errorPage404 = new ErrorPage();
            errorPage404.setErrorCode(404);
            errorPage404.setLocation("/WEB-INF/jsp/error/404.jsp");

            final ErrorPage errorPage500 = new ErrorPage();
            errorPage500.setErrorCode(500);
            errorPage500.setLocation("/WEB-INF/jsp/error/500.jsp");

            context.addErrorPage(errorPage500);
            context.addErrorPage(errorPage404);
            context.addErrorPage(errorPage403);
            context.addErrorPage(throwableErrorPage);

            final Collection<JspPropertyGroupDescriptor> jspPropertyGroups = new ArrayList<>();
            final Collection<TaglibDescriptor> taglibs = new ArrayList<>();

            final JspPropertyGroup group = new JspPropertyGroup();
            group.addUrlPattern("*.jsp");
            group.setPageEncoding("UTF-8");

            final JspPropertyGroupDescriptor descriptor = new JspPropertyGroupDescriptorImpl(group);

            jspPropertyGroups.add(descriptor);

            final JspConfigDescriptor jspConfigDescriptor = new JspConfigDescriptorImpl(jspPropertyGroups, taglibs);
            context.setJspConfigDescriptor(jspConfigDescriptor);
          }
        }
      );
    }
  }
}