As an Admin, I want to enable registry.devfile.io in CR on demand, and see all the devfiles as Getting Started samples on the User Dashboard

[ibuziuk]

Is your task related to a problem? Please describe

In order to enable the registry, the admin updates CR accordingly:

    devfileRegistry:
      externalDevfileRegistries:
        - url: https://registry.devfile.io/

On the dashboard side, all the devfiles from https://registry.devfile.io/viewer are available as the Getting Started: e.g. https://registry.devfile.io/viewer/devfiles/community/dotnet60 is displayed as

Describe the solution you'd like

on the dashboard startup we get the index from https://registry.devfile.io/index and update it to the appropriate format that UD can handle. Note that the self-links need to be correctly transformed e.g.

   "links": {
      "self": "devfile-catalog/dotnet50:1.0.3"
    }, 

should be transformed to v2 format:

  "links": {
    "v2": "https://registry.devfile.io/devfiles/dotnet50/1.0.3"
  }

Describe alternatives you've considered

N/A

Additional context

For performance optimization, we should read, https://registry.devfile.io/index only once during UD pod startup
Also, it would be nice to add the devfile.io tag on UD to all devfiles coming from https://registry.devfile.io

Also, it should be possible to disable internal registry and only use devfile.io

    devfileRegistry:
      disableInternalRegistry: true
      externalDevfileRegistries:
        - url: https://registry.devfile.io/