To build the examples above a dependency org.testcontainers:testcontainers is used to run keycloak Docker image during the tests.
Issues:

• testcontainers dependency doesn't support Podman and requires SELinux exception for accessing docker.sock
  • start docker image using bazaarvoice/maven-process-plugin instead
• for a simple `mvn clean package` build should not rely on env
  • move tests relying on the docker container to integration-test phase