Health Check & System Monitoring Module

[mftee]

Description:

Implement a HealthModule that exposes comprehensive health check and readiness endpoints so that infrastructure tools (load balancers, Kubernetes probes, uptime monitors) can verify system status.

Requirements:

• Install @nestjs/terminus
• Create a HealthController with:
  • GET /api/health — liveness probe (returns 200 OK with { status: "ok" } if the process is running)
  • GET /api/health/ready — readiness probe that checks:
    • PostgreSQL connectivity (via TypeORM DataSource)
    • Disk space (warn if less than 500MB free)
  • GET /api/health/detailed — full status including DB response time, disk usage, Node.js memory usage (process.memoryUsage()), and uptime
• Create a SystemMetricsService with:
  • getMemoryUsage() — returns { heapUsed, heapTotal, rss } in MB
  • getUptime() — returns process uptime in seconds
  • getDiskUsage() — checks free space on the upload directory
• The readiness endpoint must return 503 if any critical check fails

Acceptance Criteria:

• GET /api/health always returns 200 (pure liveness — never fails)
• GET /api/health/ready returns 503 when the DB is unreachable
• Unit tests mock the DB check and disk check
• Swagger docs on all three endpoints

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[ReinaMaze]

@ReinaMaze has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Gm , can I please be assigned to work on this ?

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[RUKAYAT-CODER]

@RUKAYAT-CODER has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Hi, am a full stack developer. I build solutions that are robust maintainable and scalable. I will like to work on this task.

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Congratulations, @RUKAYAT-CODER! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on February 26, 2026.

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This issue has been completed by @RUKAYAT-CODER as part of the Stellar Wave Program's 2nd Wave 🥳

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