Deploy VC-AuthN demo app to validate mappers

[esune]

One of the steps to upgrade VC-AuthN to 2.0 is to validate the mappers used to pass data along from the IdP to keycloak and from keycloak to the client application.

To validate this:

• [ ] Deploy an instance of the demo app for VC-AuthN in e75518-dev
• [ ] Configure a client in the digitaltrust-citz realm for the application and wire it up to the demo app
• [ ] Sign-in to the application using a verifiable credential and inspect the issued token to understand whether a Keycloak client can extract the information from a JSON blob (vc_presented_attributes) into a discrete attribute

[esune]

@i5okie please remember to clean-up the demo app when done.

Additionally, we confirmed that it is not possible to extract attribute values with a built-in mapper from a serialized JSON string stored in the KC database, therefore this issue was logged: https://github.com/bcgov/vc-authn-oidc/issues/347

[esune]

This is done. @i5okie please clean-up the demo deployment and close this when done.