Add comprehensive monitoring and lifecycle management documentation to react-vite-railpack

[Copilot]

Addresses deployment monitoring and lifecycle management issues by adding comprehensive documentation to the React Vite Railpack sample.

Problem Addressed

Users deploying React Vite applications to Defang were encountering difficulties with:

• Checking service deployment status when services are stuck in PROVISIONING state
• Monitoring application logs and health
• Managing the complete deployment lifecycle (deploy, monitor, update, cleanup)
• Troubleshooting common deployment issues

Changes Made

Enhanced the samples/react-vite-railpack/README.md with new sections:

Monitoring and Management

• Service Status Checking: Added defang services command documentation to check deployment status, service health, and resource allocations
• Real-time Logging: Documented defang tail and defang tail --name app commands for viewing application logs
• Defang Portal Integration: Added instructions for web-based monitoring at https://portal.defang.dev/

Lifecycle Management

• Zero-downtime Updates: Documented the defang compose up update process with detailed explanation of how Defang handles rolling deployments
• Cleanup and Teardown: Added defang compose down instructions for properly destroying services and cleaning up resources

Troubleshooting

• PROVISIONING State: Guidance for when services are stuck provisioning (normal behavior, how to check logs)
• Access Issues: Solutions for when deployed applications can't be reached (health checks, port configuration)
• Deployment Failures: Steps to diagnose and resolve failed deployments
• Memory Warnings: Clarification about memory reservation settings

Validation

• Verified the React application builds successfully (npm run build)
• Confirmed all documented commands align with existing Defang CLI capabilities
• Tested that the compose.yaml configuration matches the documentation (port 5173, memory reservations)
• Ensured documentation follows patterns established in other samples

This documentation now provides users with complete guidance for deploying, monitoring, and managing React Vite applications on Defang, addressing the deployment lifecycle challenges described in the issue.

Created from VS Code via the GitHub Pull Request extension.

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