Merge pull request 'docs: documentation for validate/sonar-test-nest4' (#22) from documentor-validate-sonar-test-nest4-01e0755e into main

Reviewed-on: #21

catalog/component/default/sonar-test-nest4/README.md

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+---
+title: "sonar-test-nest4"
+generated_by: documentor-agent
+generated_at: "2026-05-21T08:45:51+00:00"
+human_edited: false
+source_entity: "Component/default/sonar-test-nest4"
+source_repo: "https://gitea.kyndemo.live/validate/sonar-test-nest4"
+---
+
+## Overview
+
+`sonar-test-nest4` is a stateless microservice built using the `typescript-nestjs` runtime. It was scaffolded from the **Create Microservice** golden-path template on the Kyndryl Platform. The service provides a REST API for managing items, including endpoints for CRUD operations. It is designed to be lightweight, scalable, and observable, with integrated OpenTelemetry instrumentation and Prometheus metrics.
+
+This service plays a critical role in the demo-apps domain, serving as a testbed for platform capabilities such as CI/CD pipelines, observability, and load testing. It is managed via Humanitec and deployed to Azure Kubernetes Service (AKS) using Score-based configurations.
+
+## Repository
+
+| Field          | Value                                                                                                                              |
+|----------------|------------------------------------------------------------------------------------------------------------------------------------|
+| Source Repo    | [sonar-test-nest4](https://gitea.kyndemo.live/validate/sonar-test-nest4)                                                           |
+| Branch         | `dev`                                                                                                                             |
+| ArgoCD App     | —                                                                                                                                 |
+| Namespace      | `dev`                                                                                                                             |
+
+## Architecture
+
+`sonar-test-nest4` follows a modern microservice architecture with the following components:
+
+- **Runtime**: `typescript-nestjs`
+- **Container Port**: `3000`
+- **Endpoints**:
+  - `/api/items` for CRUD operations
+  - `/health` for health checks
+  - `/metrics` for Prometheus metrics
+- **Deployment**:
+  - Images are built and pushed to Azure Container Registry (ACR).
+  - Humanitec API triggers deployments to AKS using Score-based configurations.
+- **CI/CD**:
+  - Gitea Actions workflows (`build-push.yml` and `deploy-humanitec.yml`) automate build, test, and deployment processes.
+  - Promotion between environments (`dev → staging → prod`) is gated by CI checks and manual approvals.
+
+## Configuration
+
+| Config Key       | Value              |
+|------------------|--------------------|
+| `runtime`        | `typescript-nestjs` |
+| `health_path`    | `/health`          |
+| `container_port` | `3000`             |
+
+Additional configuration options are managed via `.platform/config.yaml` and Humanitec score files.
+
+## Operations
+
+### Deployment Flow
+
+1. Push changes to the `dev` branch to trigger automatic builds and deployments to the dev environment.
+2. Promote changes to `staging` or `prod` via PRs, requiring CI checks and one approval.
+3. Use Backstage's CI/CD tab to monitor and trigger promotions between environments.
+
+### Runbook Notes
+
+- **Health Check**: Verify service health via `/health`.
+- **Metrics**: Access Prometheus metrics at `/metrics`.
+- **Load Testing**: K6 is enabled for load testing, with configurations stored in the `k6-test-sonar-test-nest4` ConfigMap.
+
+## Observability
+
+- **Grafana Dashboard**: [OpenTelemetry Application Observability](https://grafana.kyndemo.live/d/otel-app-observability-v2/opentelemetry-application-observability?orgId=1&var-app=sonar-test-nest4)
+- **Prometheus Metrics**: Exposed at `/metrics` on port `3000`.
+
+## Dependencies
+
+- `api:default/sonar-test-nest4-api`
+
+## Links
+
+- [Humanitec Console](https://console.humanitec.dev/orgs/skillful-wild-chicken-2617/projects/domain-demo-apps)
+- [Grafana Dashboard](https://grafana.kyndemo.live/d/otel-app-observability-v2/opentelemetry-application-observability?orgId=1&var-app=sonar-test-nest4)
+- [Source Repository](https://gitea.kyndemo.live/validate/sonar-test-nest4)

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