Versioning of the app

[kimwnasptd]

Going forward we will need to have a versioning policy for the web app. This will also help integrating the app with the KServe project and making it more clear what versions of the app work with a specific KServe version.

I propose we follow the same versioning with KServe, and ensure that each version of the app works with the corresponding KServe version. For example Models web app 0.7 should be working with KServe 0.7.

cc @yuzisun @elikatsis @StefanoFioravanzo