Keycloak 26.2 + Healthcheck + Docker compose

compose.yml

# https://www.keycloak.org/observability/health

services:
  keycloak:
    image: quay.io/keycloak/keycloak:26.2
    command:
      - start-dev
      - --import-realm
    environment:      
      KEYCLOAK_ADMIN: admin
      KEYCLOAK_ADMIN_PASSWORD: admin
      DB_VENDOR: h2
      KC_HEALTH_ENABLED: true
    ports:
      - '8080:8080'
    volumes:
      - ./keycloak:/opt/keycloak/data/import
    healthcheck:
      test: ['CMD-SHELL', '[ -f /tmp/HealthCheck.java ] || echo "public class HealthCheck { public static void main(String[] args) throws java.lang.Throwable { System.exit(java.net.HttpURLConnection.HTTP_OK == ((java.net.HttpURLConnection)new java.net.URL(args[0]).openConnection()).getResponseCode() ? 0 : 1); } }" > /tmp/HealthCheck.java && java /tmp/HealthCheck.java http://localhost:9000/health/live']
      interval: 5s
      timeout: 5s
      retries: 30