Update to Vaadin 14

[nartamonov]

We use Vaadin 11 + Undertow for our project. Right now we try to migrate to Vaadin 14 and found out it is not as straightforward process as it seems at the beginning. It would be very helpful if this template updates to Vaadin 14. Very needed. Thanks!

[svenruppert]

https://github.com/Nano-Vaadin-Demos/nano-vaadin-undertow

[raider001]

Having a similar issue here, attempted to just run and update https://github.com/Nano-Vaadin-Demos/nano-vaadin-undertow, and maven just failed completely. Is there a another simple example of vaadin undertow? for the latest vaadin?

[svenruppert]

Hi @raider001 , I will have a look at it. Will try it with latest V14LTS , have not done it with V15 so far. But if you dońt need Undertow, maybe the Jetty version is good for you as well: https://github.com/Nano-Vaadin-Demos/nano-vaadin-jetty