Skip app check for ringtools

[AaronDewes]

Even with the CORS fix, the app was still shown as "starting". So this will work as a temporary workaround for 0.0.5

[pwltr]

The same logic should be added to AppStoreApp.vue that also contains the polling. A fallback idea to work around this CORS issue would be to work with the manager to check for container status with something like docker container inspect -f '{{.State.Status}}' ringtools-main-1. It's not as good an end-to-end check as the current HTTP request polling but it would work around the CORS/CORP issues. It also might come in handy for apps that don't have a web UI.

[pwltr]

We should also add some screenshots for this app.

[AaronDewes]

Sure, they can be added later. Will update the AppStoreApp code though.