Add keycloak configurations through script

Hi, I’m using jboss keycloak docker image. I need to create realm, client and so on on the startup of the container without going to the browser. So I’ve found the commands to run in docker cli which will create realm and all other parts, but can these scripts be added in the docker-compose.yml itself? Or is there any other way? The goal is to add all the required configurations in the customer’s premise when docker is up without manual intervention.