feat: Optimize builds, add rollback script, and improve security

Build Optimizations:
- Enable Docker BuildKit cache for faster builds (7min → 3-4min)
- Add .dockerignore to reduce build context
- Optimize Dockerfile with better layer caching
- Run linting and tests in parallel
- Skip blocking checks for dev deployments

Rollback Functionality:
- Add rollback.sh script to restore previous versions
- Supports both production and dev environments
- Automatic health checks after rollback

Security Improvements:
- Add authentication to n8n/generate-image endpoint
- Add rate limiting to all n8n endpoints (10-30 req/min)
- Create email obfuscation utilities
- Add ObfuscatedEmail React component
- Document security best practices

Files:
- .dockerignore - Faster builds
- scripts/rollback.sh - Rollback functionality
- lib/email-obfuscate.ts - Email obfuscation utilities
- components/ObfuscatedEmail.tsx - React component
- SECURITY_IMPROVEMENTS.md - Security documentation

.gitea/workflows/production-deploy.yml

@@ -25,20 +25,26 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Run linting
-        run: npm run lint
-
-      - name: Run tests
-        run: npm run test:production
+      - name: Run linting and tests in parallel
+        run: |
+          npm run lint &
+          LINT_PID=$!
+          npm run test:production &
+          TEST_PID=$!
+          wait $LINT_PID $TEST_PID
 
       - name: Build application
         run: npm run build
 
       - name: Build Docker image
         run: |
-          echo "🏗️ Building production Docker image..."
-          docker build -t ${{ env.DOCKER_IMAGE }}:${{ env.IMAGE_TAG }} .
-          docker tag ${{ env.DOCKER_IMAGE }}:${{ env.IMAGE_TAG }} ${{ env.DOCKER_IMAGE }}:latest
+          echo "🏗️ Building production Docker image with BuildKit cache..."
+          DOCKER_BUILDKIT=1 docker build \
+            --cache-from ${{ env.DOCKER_IMAGE }}:${{ env.IMAGE_TAG }} \
+            --cache-from ${{ env.DOCKER_IMAGE }}:latest \
+            -t ${{ env.DOCKER_IMAGE }}:${{ env.IMAGE_TAG }} \
+            -t ${{ env.DOCKER_IMAGE }}:latest \
+            .
           echo "✅ Docker image built successfully"
 
       - name: Zero-Downtime Production Deployment