https://www.keycloak.org/getting-started/getting-started-docker
docker pullquay.io/keycloak/keycloak:26.3.4
docker run -p 127.0.0.1:8080:8080 -e KC_BOOTSTRAP_ADMIN_USERNAME=admin -e KC_BOOTSTRAP_ADMIN_PASSWORD=admin quay.io/keycloak/keycloak:26.3.4 start-dev