Initial commit: Keycloak + Postgres docker-compose setup

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,49 @@
+services:
+  postgres:
+    image: postgres:16-alpine
+    container_name: ecosplay-auth-db
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: keycloak
+      POSTGRES_USER: keycloak
+      POSTGRES_PASSWORD: keycloak
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    networks:
+      - keycloak-net
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U keycloak"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  keycloak:
+    image: quay.io/keycloak/keycloak:26.0
+    container_name: ecosplay-auth-keycloak
+    restart: unless-stopped
+    command: start-dev
+    environment:
+      KC_DB: postgres
+      KC_DB_URL: jdbc:postgresql://postgres:5432/keycloak
+      KC_DB_USERNAME: keycloak
+      KC_DB_PASSWORD: keycloak
+      KC_HOSTNAME: localhost
+      KC_HTTP_ENABLED: "true"
+      KC_HEALTH_ENABLED: "true"
+      KC_METRICS_ENABLED: "true"
+      KEYCLOAK_ADMIN: admin
+      KEYCLOAK_ADMIN_PASSWORD: admin
+    ports:
+      - "8080:8080"
+    depends_on:
+      postgres:
+        condition: service_healthy
+    networks:
+      - keycloak-net
+
+volumes:
+  postgres_data:
+
+networks:
+  keycloak-net:
+    driver: bridge