- Add docker-compose.yml (v3.9) with postgres:16-alpine and keycloak:26.1 services
- Configure PostgreSQL with separate workclub and keycloak databases
- Setup Keycloak with database backend, admin user, and realm import capability
- Create PostgreSQL init script to provision development databases and users
- Add placeholder realm-export.json for Keycloak realm configuration
- Configure healthchecks and app-network bridge for service discovery
- Document configuration and patterns in learnings.md
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