Add Github Actions CI/CD workflow

Author: Get-PrivilegedLogic

.github/workflows/deploy.yml

@@ -0,0 +1,57 @@
+name: Deploy to AWS
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch: # Allows manual trigger
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: us-east-1
+
+      - name: Deploy to S3
+        run: |
+          aws s3 sync dist/ s3://sleuthwork-app --delete \
+            --cache-control "public, max-age=31536000" \
+            --exclude "index.html" \
+            --exclude "sleuth-favicon.svg"
+          
+          aws s3 cp dist/index.html s3://sleuthwork-app/index.html \
+            --cache-control "public, max-age=0, must-revalidate"
+          
+          aws s3 cp dist/sleuth-favicon.svg s3://sleuthwork-app/sleuth-favicon.svg \
+            --cache-control "public, max-age=31536000"
+
+      - name: Invalidate CloudFront cache
+        run: |
+          aws cloudfront create-invalidation \
+            --distribution-id E39DGXXW6LUXCG \
+            --paths "/*"
+
+      - name: Deployment summary
+        run: |
+          echo "✅ Deployment complete!"
+          echo "🌐 Live at: https://sleuthwork.app"