docs: Add CI/CD example for building Argo Workflows using Argo Workflows - Fixes #8591

[wesleyscholl]

A detailed example for implementing CI/CD pipelines to build Argo Workflows using Argo Workflows

Fixes #8591

Motivation

This issue was more than 2 years old and I wanted to contribute to the project. I also work with Argo Workflows everyday and I'm CAPA certified (Certified Argo Project Associate).

Modifications

WorkflowTemplate example includes:

CI

Description	Resource	Status
Argo Workflows API endpoint, submits WorkflowTemplate	WorkflowEventBinding	☑️
Build the CLI	WorkflowTemplate	☑️
Build images using Buildkit - Push images to Docker Hub	WorkflowTemplate	☑️
Run unit tests and collect test report	WorkflowTemplate	☑️
Run coverage and collect report	WorkflowTemplate	☑️
Deploy to a cluster	WorkflowTemplate	☑️
Run basic E2E tests and collect report	WorkflowTemplate	☑️

Pipeline

Description	Resource	Status
Combine CI and CD jobs with an approval step	WorkflowTemplate	☑️

CD

Description	Resource	Status
Tag and push tag	WorkflowTemplate	☑️
Update deployment manifests using kustomize edit set image	WorkflowTemplate	☑️
Commit deployment manifests	WorkflowTemplate	☑️
Start Argo CD sync step	WorkflowTemplate	☑️

Documentation & Configuration

Description	Resource	Status
CI, CD, & Pipeline Documentation	Comments	☑️
Service Account for WorkflowEventBinding	ServiceAccount	☑️
$ARGO_TOKEN - Bearer Authorization for WorkflowEventBinding	Secret	☑️
Role to submit workflow templates for WorkflowEventBinding	Role	☑️
RoleBinding the Role to the ServiceAccount for WorkflowEventBinding	RoleBinding	☑️
Docker configuration - Hub credentials	Secret	☑️
GitHub PAT - GitHub credentials	Secret	☑️
ArgoCD server and credentials	Secret	☑️
ArgoCD network policy	NetworkPolicy	☑️

Verification

Thoroughly tested the workflow:

• E2E Workflow

• Workflow steps

• clone-repo

• build-cli

• create-exec-image

• create-cli-image

• run-tests

• run-coverage

• prepare-deploy-to-cluster-e2e-test

• approval

• docker-tag-push

• update-manifests

• commit-manifests

• start-argocd-sync