feat: ArgoCD GitOps setup — Week 10

docs/week-10-notes.md

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+# Week 10 — ArgoCD GitOps Setup
+
+## What ArgoCD does
+ArgoCD watches your GitHub repo. When anything in k8s/base/ changes,
+it automatically applies those changes to the EKS cluster.
+No more manual kubectl apply.
+
+## To Install ArgoCD 
+winget install -e --id argoproj.argocd
+
+The official Argo CD CLI documentation also lists WinGet as a supported installation method.
+
+## I got this!!
+PS C:\Projects\crms> argocd version --client
+argocd: v3.4.4+443415b
+  BuildDate: 2026-06-18T09:15:00Z
+  GitCommit: 443415b5527ac55366e0760c93ef0e1abd0cf273
+  GitTreeState: clean
+  GoVersion: go1.26.0
+  Compiler: gc
+  Platform: windows/amd64
+
+## Install ArgoCD on cluster
+kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
+
+## Access ArgoCD UI
+kubectl port-forward svc/argocd-server -n argocd 8080:443
+
+## Get initial admin password
+kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d
+
+## Deploy CRMS Application
+kubectl apply -f k8s/argocd/crms-application.yaml
+
+## GitOps flow after setup
+1. Developer pushes code to GitHub
+2. GitHub Actions builds new Docker image, pushes to GHCR
+3. GitHub Actions updates image tag in k8s/base/backend-deployment.yaml
+4. ArgoCD detects change in Git
+5. ArgoCD automatically syncs to EKS cluster
+6. New pods roll out with zero downtime

k8s/argocd/crms-application.yaml

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+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: crms
+  namespace: argocd
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  project: default
+  source:
+    repoURL: https://github.com/crms-devops/crms.git
+    targetRevision: main
+    path: k8s/base
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: crms
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true
+      - ApplyOutOfSyncOnly=true

k8s/argocd/namespace.yaml

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+apiVersion: v1
+kind: Namespace
+metadata:
+  name: argocd
+  labels:
+    app: argocd