Make the welcome visible without login in every case

With keycloak integration, the welcome page detects the login into keycloak.

• Welcome page visible without login
• If Keycloak, when clicking the button, we land into keycloak login
• If Http, we go into the login endpoint
• If http but no user, pop up explaining you need to create a user
• If there is no auth or the server down, go to the console