Very minimal development compose setup for Keycloak.

test/compose.yaml

@@ -1,62 +1,27 @@
 services:
-  app:
-    image: "keycloak/keycloak:26.1"
-    entrypoint: >
-      bash -c "KEYCLOAK_ADMIN_PASSWORD=\"$$(cat /run/secrets/admin_password)\" KC_DB_PASSWORD=\"$$(cat /run/secrets/db_password)\" /opt/keycloak/bin/kc.sh start"
-    networks:
-      - internal
-    secrets:
-      - admin_password
-      - db_password
+  keycloak:
+    image: quay.io/keycloak/keycloak:latest
+    command: start-dev
     environment:
-      - KC_DB=postgres
-      - KC_DB_URL_DATABASE=keycloak
-      - KC_DB_URL_HOST=db
-      - KC_HOSTNAME=https://${DOMAIN}
-      - KC_PROXY_HEADERS=forwarded
-      - KEYCLOAK_ADMIN=${ADMIN_USERNAME}
-      - KEYCLOAK_WELCOME_THEME=${WELCOME_THEME}
-      - KC_FEATURES
-      - KC_HTTP_ENABLED=true
-    volumes:
-      - "themes:/opt/keycloak/themes"
-      - "providers:/opt/keycloak/providers"
+      KC_DB: postgres
+      KC_DB_URL: jdbc:postgresql://db/keycloak
+      KC_DB_USERNAME: keycloak
+      KC_DB_PASSWORD: keycloak
+      KC_BOOTSTRAP_ADMIN_USERNAME: admin
+      KC_BOOTSTRAP_ADMIN_PASSWORD: admin
+    ports:
+      - "8080:8080"
     depends_on:
       - db
-    deploy:
-      update_config:
-        failure_action: rollback
-        order: start-first
 
   db:
-    image: "postgres:17"
+    image: postgres:latest
     environment:
-      - POSTGRES_DB=keycloak
-      - POSTGRES_USER=keycloak
-      - POSTGRES_PASSWORD_FILE=/run/secrets/db_password
-    secrets:
-      - db_password
-      - db_root_password
+      POSTGRES_DB: keycloak
+      POSTGRES_USER: keycloak
+      POSTGRES_PASSWORD: keycloak
     volumes:
-      - "postgres:/var/lib/postgresql/data"
-    networks:
-      - internal
-
-networks:
-  internal:
-
-secrets:
-  admin_password:
-    name: keycloak_admin_password
-    external: true
-  db_password:
-    name: keycloak_db_password
-    external: true
-  db_root_password:
-    name: keycloak_db_root_password
-    external: true
+      - postgres_data:/var/lib/postgresql/data
 
 volumes:
-  postgres:
-  themes:
-  providers:
+  postgres_data: