Docker Registry Setup and Security

Help me set up a secure private Docker registry.

Requirements:
- Deployment type: [on-premise/cloud]
- Expected images: [count, total size]
- Users/teams: [authentication needs]
- Compliance: [security requirements]

Registry setup:
1. Registry deployment
   - Docker Registry v2
   - Harbor (if enterprise features needed)
   - Storage backend (S3, GCS, Azure Blob, local)

2. Security configuration
   - TLS certificates
   - Authentication (basic, token, LDAP/AD, OIDC)
   - Authorization and RBAC
   - Content trust (image signing)

3. Vulnerability scanning
   - Trivy integration
   - Clair integration
   - Scan policies

4. Operations
   - Garbage collection
   - Replication (multi-site)
   - Backup strategy
   - Monitoring and alerts

Include Docker Compose/Kubernetes deployment and client configuration.