diff --git a/.github/workflows/node-azure-deploy.yml b/.github/workflows/node-azure-deploy.yml
new file mode 100644
index 0000000..1eedfcc
--- /dev/null
+++ b/.github/workflows/node-azure-deploy.yml
@@ -0,0 +1,228 @@
+name: Node.js CI/CD to Azure
+
+# Teaching example for GitHub Actions with Azure deployment
+
+on:
+  push:
+    branches: [ main, master ]
+    paths:
+      - 'nodeapp-1/**'
+      - '.github/workflows/node-azure-deploy.yml'
+  pull_request:
+    branches: [ main, master ]
+  workflow_dispatch:
+    inputs:
+      environment:
+        description: 'Environment to deploy to'
+        required: true
+        default: 'development'
+        type: choice
+        options:
+          - development
+          - staging
+          - production
+
+env:
+  NODE_VERSION: '18.x'
+  AZURE_WEBAPP_NAME: 'webapp-az400-demo'
+  AZURE_WEBAPP_PACKAGE_PATH: './nodeapp-1'
+  WORKING_DIRECTORY: 'nodeapp-1'
+
+jobs:
+  # ========================================
+  # JOB 1: BUILD AND TEST
+  # ========================================
+  build:
+    name: Build and Test
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: 📥 Checkout code
+      uses: actions/checkout@v4
+
+    - name: 🔧 Setup Node.js ${{ env.NODE_VERSION }}
+      uses: actions/setup-node@v4
+      with:
+        node-version: ${{ env.NODE_VERSION }}
+        cache: 'npm'
+        cache-dependency-path: '${{ env.WORKING_DIRECTORY }}/package-lock.json'
+
+    - name: 📦 Install dependencies
+      run: npm ci
+      working-directory: ${{ env.WORKING_DIRECTORY }}
+
+    - name: 🔒 Security audit
+      run: npm audit --audit-level=high
+      working-directory: ${{ env.WORKING_DIRECTORY }}
+      continue-on-error: true
+
+    - name: 🧹 Lint code
+      run: npm run lint
+      working-directory: ${{ env.WORKING_DIRECTORY }}
+
+    - name: 🧪 Run tests with Mocha
+      run: npm test
+      working-directory: ${{ env.WORKING_DIRECTORY }}
+
+    - name: 📊 Upload test results
+      uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: mochawesome-report
+        path: ${{ env.WORKING_DIRECTORY }}/mochawesome-report
+        retention-days: 7
+
+    - name: 📤 Upload artifact for deployment
+      uses: actions/upload-artifact@v4
+      with:
+        name: node-app
+        path: ${{ env.WORKING_DIRECTORY }}
+        retention-days: 5
+
+  # ========================================
+  # JOB 2: DEPLOY TO DEVELOPMENT
+  # ========================================
+  deploy-dev:
+    name: Deploy to Development
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    environment:
+      name: development
+      url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}
+
+    steps:
+    - name: 📥 Download artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: node-app
+        path: ./app
+
+    - name: 🔐 Login to Azure
+      uses: azure/login@v1
+      with:
+        creds: ${{ secrets.AZURE_CREDENTIALS }}
+
+    - name: 🚀 Deploy to Azure Web App
+      id: deploy-to-webapp
+      uses: azure/webapps-deploy@v3
+      with:
+        app-name: ${{ env.AZURE_WEBAPP_NAME }}-dev
+        package: ./app
+        startup-command: 'npm start'
+
+    - name: 🔥 Smoke test
+      run: |
+        sleep 30
+        response=$(curl -s -o /dev/null -w "%{http_code}" https://${{ env.AZURE_WEBAPP_NAME }}-dev.azurewebsites.net)
+        if [ $response -eq 200 ]; then
+          echo "✅ Smoke test passed!"
+        else
+          echo "❌ Smoke test failed with status code: $response"
+          exit 1
+        fi
+
+  # ========================================
+  # JOB 3: DEPLOY TO STAGING
+  # ========================================
+  deploy-staging:
+    name: Deploy to Staging
+    runs-on: ubuntu-latest
+    needs: deploy-dev
+    environment:
+      name: staging
+      url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}
+
+    steps:
+    - name: 📥 Checkout for tests
+      uses: actions/checkout@v4
+
+    - name: 📥 Download artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: node-app
+        path: ./app
+
+    - name: 🔐 Login to Azure
+      uses: azure/login@v1
+      with:
+        creds: ${{ secrets.AZURE_CREDENTIALS }}
+
+    - name: 🚀 Deploy to staging slot
+      id: deploy-to-webapp
+      uses: azure/webapps-deploy@v3
+      with:
+        app-name: ${{ env.AZURE_WEBAPP_NAME }}
+        slot-name: staging
+        package: ./app
+
+    - name: 🧪 Run integration tests
+      run: |
+        cd ${{ env.WORKING_DIRECTORY }}
+        npm ci
+        export TEST_URL=https://${{ env.AZURE_WEBAPP_NAME }}-staging.azurewebsites.net
+        npm test
+      continue-on-error: true
+
+  # ========================================
+  # JOB 4: DEPLOY TO PRODUCTION
+  # ========================================
+  deploy-prod:
+    name: Deploy to Production
+    runs-on: ubuntu-latest
+    needs: deploy-staging
+    environment:
+      name: production
+      url: ${{ steps.swap-slots.outputs.webapp-url }}
+
+    steps:
+    - name: 🔐 Login to Azure
+      uses: azure/login@v1
+      with:
+        creds: ${{ secrets.AZURE_CREDENTIALS }}
+
+    - name: 🔄 Swap staging to production
+      id: swap-slots
+      run: |
+        az webapp deployment slot swap \
+          --resource-group rg-az400-demo \
+          --name ${{ env.AZURE_WEBAPP_NAME }} \
+          --slot staging \
+          --target-slot production
+        
+        echo "webapp-url=https://${{ env.AZURE_WEBAPP_NAME }}.azurewebsites.net" >> $GITHUB_OUTPUT
+
+    - name: 🏷️ Create release tag
+      if: success()
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const tag = `v${context.runNumber}`;
+          await github.rest.git.createRef({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            ref: `refs/tags/${tag}`,
+            sha: context.sha
+          });
+          console.log(`✅ Created tag: ${tag}`);
+
+# ========================================
+# REUSABLE WORKFLOW: SECURITY SCAN
+# ========================================
+  security-scan:
+    name: Security Scanning
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    
+    steps:
+    - name: 📥 Checkout code
+      uses: actions/checkout@v4
+
+    - name: 🔍 Run Dependabot scan
+      uses: github/super-linter@v5
+      env:
+        DEFAULT_BRANCH: main
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        VALIDATE_JAVASCRIPT_ES: true
+        VALIDATE_JSON: true
+        VALIDATE_YAML: true
diff --git a/pipelines/multi-stage-cicd.yml b/pipelines/multi-stage-cicd.yml
new file mode 100644
index 0000000..108c341
--- /dev/null
+++ b/pipelines/multi-stage-cicd.yml
@@ -0,0 +1,285 @@
+# Multi-Stage CI/CD Pipeline for Node.js to Azure
+# Teaching example for full DevOps pipeline with environments
+
+trigger:
+  branches:
+    include:
+    - master
+    - main
+  paths:
+    include:
+    - nodeapp-1/*
+
+pr:
+  branches:
+    include:
+    - master
+    - main
+
+pool:
+  vmImage: 'ubuntu-latest'
+
+variables:
+  nodeVersion: '18.x'
+  azureSubscription: 'AZ400-ServiceConnection' # Update with your service connection
+  resourceGroupName: 'rg-az400-demo'
+  webAppName: 'webapp-az400-$(Build.BuildId)'
+  environmentNameDev: 'Development'
+  environmentNameStaging: 'Staging'
+  environmentNameProd: 'Production'
+  workingDirectory: 'nodeapp-1'
+
+stages:
+# ========================================
+# STAGE 1: BUILD
+# ========================================
+- stage: Build
+  displayName: 'Build and Test'
+  jobs:
+  - job: BuildJob
+    displayName: 'Build Node.js Application'
+    steps:
+    # Setup Node.js
+    - task: NodeTool@0
+      displayName: 'Install Node.js $(nodeVersion)'
+      inputs:
+        versionSpec: $(nodeVersion)
+
+    # Install dependencies
+    - script: |
+        echo "📦 Installing dependencies..."
+        npm ci
+      displayName: 'Install dependencies'
+      workingDirectory: $(workingDirectory)
+
+    # Run security audit
+    - script: |
+        echo "🔒 Running security audit..."
+        npm audit --audit-level=high || true
+      displayName: 'Security audit'
+      workingDirectory: $(workingDirectory)
+
+    # Run linting
+    - script: |
+        echo "🔍 Running linter..."
+        npm run lint
+      displayName: 'Lint code'
+      workingDirectory: $(workingDirectory)
+      continueOnError: true
+
+    # Run unit tests with Mocha
+    - script: |
+        echo "🧪 Running Mocha tests..."
+        npm test
+      displayName: 'Run unit tests'
+      workingDirectory: $(workingDirectory)
+
+    # Publish test results
+    - task: PublishHtmlReport@1
+      displayName: 'Publish Mochawesome Report'
+      inputs:
+        reportDir: '$(workingDirectory)/mochawesome-report'
+        tabName: 'Test Results'
+      condition: succeededOrFailed()
+
+    # Create deployment package
+    - task: ArchiveFiles@2
+      displayName: 'Create deployment package'
+      inputs:
+        rootFolderOrFile: $(workingDirectory)
+        includeRootFolder: false
+        archiveType: 'zip'
+        archiveFile: '$(Build.ArtifactStagingDirectory)/$(Build.BuildId).zip'
+
+    # Publish artifact
+    - publish: $(Build.ArtifactStagingDirectory)
+      artifact: drop
+      displayName: 'Publish artifact'
+
+    # Publish to Azure Artifacts Dev Feed
+    - task: Npm@1
+      displayName: 'Publish to Dev Feed'
+      inputs:
+        command: 'custom'
+        workingDir: $(workingDirectory)
+        customCommand: 'run publish:dev'
+      condition: and(succeeded(), eq(variables['Build.SourceBranch'], 'refs/heads/develop'))
+
+# ========================================
+# STAGE 2: DEPLOY TO DEVELOPMENT
+# ========================================
+- stage: DeployDev
+  displayName: 'Deploy to Development'
+  dependsOn: Build
+  condition: succeeded()
+  jobs:
+  - deployment: DeployToDev
+    displayName: 'Deploy to Dev Environment'
+    environment: $(environmentNameDev)
+    strategy:
+      runOnce:
+        deploy:
+          steps:
+          # Download artifact
+          - download: current
+            artifact: drop
+            displayName: 'Download artifact'
+
+          # Deploy to Azure Web App
+          - task: AzureWebApp@1
+            displayName: 'Deploy to Dev Web App'
+            inputs:
+              azureSubscription: $(azureSubscription)
+              appType: 'webAppLinux'
+              appName: '$(webAppName)-dev'
+              package: '$(Pipeline.Workspace)/drop/*.zip'
+              runtimeStack: 'NODE|18-lts'
+              startUpCommand: 'npm start'
+
+          # Smoke test
+          - script: |
+              echo "🔥 Running smoke tests..."
+              sleep 30
+              curl -f https://$(webAppName)-dev.azurewebsites.net || exit 1
+              echo "✅ Smoke tests passed!"
+            displayName: 'Smoke test'
+
+# ========================================
+# STAGE 3: DEPLOY TO STAGING
+# ========================================
+- stage: DeployStaging
+  displayName: 'Deploy to Staging'
+  dependsOn: DeployDev
+  condition: succeeded()
+  jobs:
+  - deployment: DeployToStaging
+    displayName: 'Deploy to Staging Environment'
+    environment: 
+      name: $(environmentNameStaging)
+      resourceType: VirtualMachine
+    strategy:
+      runOnce:
+        deploy:
+          steps:
+          # Download artifact
+          - download: current
+            artifact: drop
+            displayName: 'Download artifact'
+
+          # Deploy to staging slot
+          - task: AzureWebApp@1
+            displayName: 'Deploy to Staging Slot'
+            inputs:
+              azureSubscription: $(azureSubscription)
+              appType: 'webAppLinux'
+              appName: '$(webAppName)-staging'
+              deployToSlotOrASE: true
+              slotName: 'staging'
+              package: '$(Pipeline.Workspace)/drop/*.zip'
+              runtimeStack: 'NODE|18-lts'
+
+          # Run integration tests using Chai-HTTP
+          - script: |
+              echo "🧪 Running integration tests..."
+              # Install test dependencies
+              npm ci
+              # Run tests against staging URL
+              export TEST_URL=https://$(webAppName)-staging.azurewebsites.net
+              npm test
+            displayName: 'Integration tests'
+            workingDirectory: $(workingDirectory)
+            continueOnError: true
+
+# ========================================
+# STAGE 4: DEPLOY TO PRODUCTION
+# ========================================
+- stage: DeployProd
+  displayName: 'Deploy to Production'
+  dependsOn: DeployStaging
+  condition: succeeded()
+  jobs:
+  - deployment: DeployToProd
+    displayName: 'Deploy to Production Environment'
+    environment: 
+      name: $(environmentNameProd)
+      resourceType: VirtualMachine
+    strategy:
+      runOnce:
+        preDeploy:
+          steps:
+          - script: |
+              echo "📋 Pre-deployment checklist:"
+              echo "✓ All tests passed"
+              echo "✓ Security scan completed"
+              echo "✓ Staging validation complete"
+            displayName: 'Pre-deployment validation'
+        
+        deploy:
+          steps:
+          # Download artifact
+          - download: current
+            artifact: drop
+            displayName: 'Download artifact'
+
+          # Blue-Green deployment
+          - task: AzureWebApp@1
+            displayName: 'Deploy to Production (Blue-Green)'
+            inputs:
+              azureSubscription: $(azureSubscription)
+              appType: 'webAppLinux'
+              appName: $(webAppName)
+              deployToSlotOrASE: true
+              slotName: 'staging'
+              package: '$(Pipeline.Workspace)/drop/*.zip'
+              runtimeStack: 'NODE|18-lts'
+
+          # Swap slots
+          - task: AzureAppServiceManage@0
+            displayName: 'Swap staging to production'
+            inputs:
+              azureSubscription: $(azureSubscription)
+              WebAppName: $(webAppName)
+              ResourceGroupName: $(resourceGroupName)
+              SourceSlot: 'staging'
+              SwapWithProduction: true
+
+          # Publish to Azure Artifacts Prod Feed
+          - task: Npm@1
+            displayName: 'Publish to Prod Feed'
+            inputs:
+              command: 'custom'
+              workingDir: $(workingDirectory)
+              customCommand: 'run publish:prod'
+            condition: succeeded()
+
+        postRouteTraffic:
+          steps:
+          # Monitor deployment
+          - script: |
+              echo "📊 Monitoring deployment health..."
+              # Add Application Insights queries here
+              echo "✅ Deployment healthy"
+            displayName: 'Monitor deployment'
+
+        on:
+          failure:
+            steps:
+            # Rollback on failure
+            - task: AzureAppServiceManage@0
+              displayName: 'Rollback: Swap slots back'
+              inputs:
+                azureSubscription: $(azureSubscription)
+                WebAppName: $(webAppName)
+                ResourceGroupName: $(resourceGroupName)
+                SourceSlot: 'production'
+                TargetSlot: 'staging'
+                SwapWithProduction: false
+
+          success:
+            steps:
+            - script: |
+                echo "🎉 Production deployment successful!"
+                echo "URL: https://$(webAppName).azurewebsites.net"
+                echo "Build: $(Build.BuildId)"
+                echo "Commit: $(Build.SourceVersion)"
+              displayName: 'Deployment summary'
diff --git a/pipelines/single-stage-ci.yml b/pipelines/single-stage-ci.yml
new file mode 100644
index 0000000..1c2296e
--- /dev/null
+++ b/pipelines/single-stage-ci.yml
@@ -0,0 +1,97 @@
+# Single-Stage CI Pipeline for Node.js
+# Teaching example for basic continuous integration
+
+trigger:
+  branches:
+    include:
+    - master
+    - main
+  paths:
+    include:
+    - nodeapp-1/*
+
+pool:
+  vmImage: 'ubuntu-latest'
+
+variables:
+  nodeVersion: '18.x'
+  artifactName: 'drop'
+  workingDirectory: 'nodeapp-1'
+
+steps:
+# Step 1: Setup Node.js environment
+- task: NodeTool@0
+  displayName: 'Install Node.js $(nodeVersion)'
+  inputs:
+    versionSpec: $(nodeVersion)
+
+# Step 2: Install dependencies
+- script: |
+    echo "Installing npm dependencies..."
+    npm ci
+  displayName: 'npm install'
+  workingDirectory: $(workingDirectory)
+
+# Step 3: Run linting
+- script: |
+    echo "Running ESLint..."
+    npm run lint
+  displayName: 'Run linting'
+  workingDirectory: $(workingDirectory)
+  continueOnError: true
+
+# Step 4: Run unit tests with Mocha
+- script: |
+    echo "Running Mocha tests..."
+    npm test
+  displayName: 'Run unit tests'
+  workingDirectory: $(workingDirectory)
+
+# Step 5: Publish test results (mochawesome generates HTML reports)
+- task: PublishHtmlReport@1
+  displayName: 'Publish Mochawesome Report'
+  inputs:
+    reportDir: '$(workingDirectory)/mochawesome-report'
+    tabName: 'Test Results'
+  condition: succeededOrFailed()
+
+# Step 6: Security audit
+- script: |
+    echo "Running npm audit..."
+    npm audit --audit-level=high
+  displayName: 'Security audit'
+  workingDirectory: $(workingDirectory)
+  continueOnError: true
+
+# Step 7: Create artifact (no build step - it's a runtime app)
+- task: ArchiveFiles@2
+  displayName: 'Archive application files'
+  inputs:
+    rootFolderOrFile: $(workingDirectory)
+    includeRootFolder: false
+    archiveType: 'zip'
+    archiveFile: '$(Build.ArtifactStagingDirectory)/$(Build.BuildId).zip'
+
+# Step 8: Publish artifact
+- task: PublishBuildArtifacts@1
+  displayName: 'Publish artifact'
+  inputs:
+    PathtoPublish: '$(Build.ArtifactStagingDirectory)'
+    ArtifactName: $(artifactName)
+    publishLocation: 'Container'
+
+# Step 9: Publish to Azure Artifacts (optional)
+- script: |
+    echo "Ready to publish to Azure Artifacts feed"
+    echo "Use: npm run publish:dev or npm run publish:prod"
+  displayName: 'Azure Artifacts info'
+  condition: succeeded()
+
+# Success notification
+- script: |
+    echo "✅ Build completed successfully!"
+    echo "Build ID: $(Build.BuildId)"
+    echo "Source branch: $(Build.SourceBranch)"
+    echo "Commit: $(Build.SourceVersion)"
+  displayName: 'Build summary'
+  condition: succeeded()