Add complete MNMD Docker deployment example with startup coordination and VolumeNotFound fix (#642)

* Initial plan

* Add MNMD Docker deployment example with 4 nodes x 4 drives

- Create docs/examples/mnmd/ directory structure
- Add docker-compose.yml with proper disk indexing (1..4)
- Add wait-and-start.sh for startup coordination
- Add README.md with usage instructions and alternatives
- Add CHECKLIST.md with step-by-step verification
- Fixes VolumeNotFound issue by using correct volume paths
- Implements health checks and startup ordering
- Uses service names for stable inter-node addressing

Co-authored-by: houseme <4829346+houseme@users.noreply.github.com>

* Add docs/examples README as index for deployment examples

Co-authored-by: houseme <4829346+houseme@users.noreply.github.com>

* Add automated test script for MNMD deployment

- Add test-deployment.sh with comprehensive validation
- Test container status, health, endpoints, connectivity
- Update README to reference test script
- Make script executable

Co-authored-by: houseme <4829346+houseme@users.noreply.github.com>

* improve code

* improve code

* improve dep crates `cargo shear --fix`

* upgrade aws-sdk-s3

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: houseme <4829346+houseme@users.noreply.github.com>
Co-authored-by: houseme <housemecn@gmail.com>

docs/examples/README.md

@@ -0,0 +1,60 @@
+# RustFS Deployment Examples
+
+This directory contains practical deployment examples and configurations for RustFS.
+
+## Available Examples
+
+### [MNMD (Multi-Node Multi-Drive)](./mnmd/)
+
+Complete Docker Compose example for deploying RustFS in a 4-node, 4-drive-per-node configuration.
+
+**Features:**
+- Proper disk indexing (1..4) to avoid VolumeNotFound errors
+- Startup coordination via `wait-and-start.sh` script
+- Service discovery using Docker service names
+- Health checks with alternatives for different base images
+- Comprehensive documentation and verification checklist
+
+**Use Case:** Production-ready multi-node deployment for high availability and performance.
+
+**Quick Start:**
+```bash
+cd docs/examples/mnmd
+docker-compose up -d
+```
+
+**See also:**
+- [MNMD README](./mnmd/README.md) - Detailed usage guide
+- [MNMD CHECKLIST](./mnmd/CHECKLIST.md) - Step-by-step verification
+
+## Other Deployment Examples
+
+For additional deployment examples, see:
+- [`examples/`](/examples/) - Root-level examples directory with:
+  - `docker-quickstart.sh` - Quick start script for basic deployments
+  - `enhanced-docker-deployment.sh` - Advanced deployment scenarios
+  - `docker-comprehensive.yml` - Docker Compose with multiple profiles
+- [`.docker/compose/`](/.docker/compose/) - Docker Compose configurations:
+  - `docker-compose.cluster.yaml` - Basic cluster setup
+  - `docker-compose.observability.yaml` - Observability stack integration
+
+## Related Documentation
+
+- [Console & Endpoint Service Separation](../console-separation.md)
+- [Environment Variables](../ENVIRONMENT_VARIABLES.md)
+- [Performance Testing](../PERFORMANCE_TESTING.md)
+
+## Contributing
+
+When adding new examples:
+1. Create a dedicated subdirectory under `docs/examples/`
+2. Include a comprehensive README.md
+3. Provide working configuration files
+4. Add verification steps or checklists
+5. Document common issues and troubleshooting
+
+## Support
+
+For issues or questions:
+- GitHub Issues: https://github.com/rustfs/rustfs/issues
+- Documentation: https://rustfs.io