The example uses the embedded Spring Boot Keycloak Server to quickly spin up a new Keycloak instance.
Create JBang script with
jbang init spring-keycloak-server
Adapt spring-keycloak-server
script.
Run the Keycloak server via:
export KEYCLOAK_CUSTOM_ADMINUSER_PASSWORD=admin
export SERVER_PORT=8081
sh ./spring-keycloak-server
The Keycloak Admin-Console is then available via http://localhost:8081/auth