Support calls from Docker to Host

[rosieks]

I have service hosted on docker that obtain token from keycloak. Later this service calls my local project with that token and it fails. It's because issuer is set to host.docker.internal, while my app expect it to be localhost based on Authority property. It would be nice if WithReference could add both issuers (ContainerHost,Host) to environment variable and then AddKeycloakWebApiAuthentication consume it and add those as ValidIssuers

[NikiforovAll]

Sounds like a great feature for local development. Would you like to contribute?

[rosieks]

Actually I found that setting such variables in keycloak makes it work:

    .WithEnvironment("KC_HOSTNAME", "localhost") 
    .WithEnvironment("KC_HOSTNAME_BACKCHANNEL_DYNAMIC","true")

I wonder which way is better

[NikiforovAll]

I think env variables are a great way to control this one. We can still add them to Keycloak.Aspire package