- Create staging stack with separate containers and volumes
- Configure staging.michaelschiemer.de subdomain routing
- Add deploy-staging.yml workflow for auto-deployment
- Extend build-image.yml to support staging branch
- Separate Redis instance and network for staging
- Staging uses staging branch by default
Features:
- Auto-deploy: Push to staging branch → build → deploy to staging
- Separate from production: Different containers, volumes, networks
- Shared Traefik: Uses same SSL certificates (*.michaelschiemer.de)
- Testing environment before production deployment
