Reroute from HomePage to WelcomePage on first visit

@Theme(Lumo.class)
@Route("")
public class ViewContainer extends VerticalLayout implements RouterLayout{

	private final HorizontalLayout contentLayout;
	
    public ViewContainer()
	{
      //content
	}
	
	public void showRouterLayoutContent(HasElement content) {
    	if (content == null) {
    		contentLayout.getElement().appendChild(new Div().getElement());
			return;
		}
	   	contentLayout.getElement().appendChild(content.getElement());
	}

}

Hello,
our student-project is set up on vaadin flow (vaadin 10).
When entering, page content is null. I have to reroute a part of my page to show a “welcome” content defined in WelcomeView.class.

@HtmlImport("styles/shared-styles.html")
@Route(value = "welcome", layout = ViewContainer.class)
public class WelcomeView extends Div {
    public void WelcomneView(){
....

Can anyone please help me or give a hint in any kind?
At the moment a local server is set up and localhost:9090 just shows site as shown in attachment.
On the right side there should be content of “WelcomeView” but is empty at the moment.

17102086.xcf (131 KB)