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

scripts/rollback.sh

@@ -0,0 +1,121 @@
+#!/bin/bash
+
+# Rollback Script for Portfolio Deployment
+# Restores previous version of the application
+
+set -e
+
+# Colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m'
+
+log() {
+    echo -e "${BLUE}[$(date +'%Y-%m-%d %H:%M:%S')]${NC} $1"
+}
+
+error() {
+    echo -e "${RED}[ERROR]${NC} $1" >&2
+}
+
+success() {
+    echo -e "${GREEN}[SUCCESS]${NC} $1"
+}
+
+warning() {
+    echo -e "${YELLOW}[WARNING]${NC} $1"
+}
+
+# Check if environment is specified
+ENV=${1:-production}
+COMPOSE_FILE="docker-compose.production.yml"
+CONTAINER_NAME="portfolio-app"
+IMAGE_TAG="production"
+
+if [ "$ENV" == "dev" ] || [ "$ENV" == "staging" ]; then
+    COMPOSE_FILE="docker-compose.staging.yml"
+    CONTAINER_NAME="portfolio-app-staging"
+    IMAGE_TAG="staging"
+    HEALTH_PORT="3002"
+else
+    HEALTH_PORT="3000"
+fi
+
+log "🔄 Starting rollback for $ENV environment..."
+
+# Check if Docker is running
+if ! docker info > /dev/null 2>&1; then
+    error "Docker is not running. Please start Docker and try again."
+    exit 1
+fi
+
+# List available image tags
+log "📋 Available image versions:"
+docker images portfolio-app --format "table {{.Tag}}\t{{.ID}}\t{{.CreatedAt}}" | head -10
+
+# Get current container image
+CURRENT_IMAGE=$(docker inspect $CONTAINER_NAME --format='{{.Config.Image}}' 2>/dev/null || echo "")
+if [ ! -z "$CURRENT_IMAGE" ]; then
+    log "Current image: $CURRENT_IMAGE"
+fi
+
+# Find previous image tags
+PREVIOUS_TAGS=$(docker images portfolio-app --format "{{.Tag}}" | grep -E "^(production|staging|latest|previous|backup)" | grep -v "^$IMAGE_TAG$" | head -5)
+
+if [ -z "$PREVIOUS_TAGS" ]; then
+    error "No previous images found for rollback!"
+    log "Available images:"
+    docker images portfolio-app
+    exit 1
+fi
+
+# Use the first previous tag (most recent)
+PREVIOUS_TAG=$(echo "$PREVIOUS_TAGS" | head -1)
+log "Selected previous image: portfolio-app:$PREVIOUS_TAG"
+
+# Confirm rollback
+read -p "Do you want to rollback to portfolio-app:$PREVIOUS_TAG? (y/N): " -n 1 -r
+echo
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+    log "Rollback cancelled."
+    exit 0
+fi
+
+# Tag the previous image as current
+log "🔄 Tagging previous image as current..."
+docker tag "portfolio-app:$PREVIOUS_TAG" "portfolio-app:$IMAGE_TAG" || {
+    error "Failed to tag previous image"
+    exit 1
+}
+
+# Stop current container
+log "🛑 Stopping current container..."
+docker compose -f $COMPOSE_FILE down || true
+
+# Start with previous image
+log "🚀 Starting previous version..."
+docker compose -f $COMPOSE_FILE up -d
+
+# Wait for health check
+log "⏳ Waiting for health check..."
+for i in {1..40}; do
+    if curl -f http://localhost:$HEALTH_PORT/api/health > /dev/null 2>&1; then
+        success "✅ Rollback successful! Application is healthy."
+        break
+    fi
+    echo -n "."
+    sleep 3
+done
+
+if ! curl -f http://localhost:$HEALTH_PORT/api/health > /dev/null 2>&1; then
+    error "❌ Health check failed after rollback!"
+    log "Container logs:"
+    docker compose -f $COMPOSE_FILE logs --tail=50
+    exit 1
+fi
+
+success "🎉 Rollback completed successfully!"
+log "Application is available at: http://localhost:$HEALTH_PORT"
+log "To rollback further, run: ./scripts/rollback.sh $ENV"