feat: Add complete production deployment infrastructure

- Docker configuration:
  - Multi-stage Dockerfiles for backend (Python 3.11) and frontend (Node 20)
  - Production docker-compose.yml with all services
  - Development docker-compose.dev.yml with hot-reload

- Nginx reverse proxy:
  - SSL/TLS termination with modern cipher suites
  - Rate limiting and security headers
  - Caching and compression
  - Load balancing ready

- Kubernetes manifests:
  - Deployment, Service, Ingress configurations
  - ConfigMap and Secrets
  - HPA for auto-scaling
  - PersistentVolumeClaims

- Deployment scripts:
  - deploy.sh: Automated deployment with health checks
  - backup.sh: Automated backup with retention
  - health-check.sh: Service health monitoring
  - setup-ssl.sh: Let's Encrypt SSL automation

- Monitoring:
  - Prometheus configuration
  - Grafana dashboards (optional)
  - Structured logging

- Documentation:
  - DEPLOYMENT_GUIDE.md: Complete deployment instructions
  - Environment templates (.env.production)

Ready for commercial deployment!

docker/frontend/Dockerfile

@@ -0,0 +1,51 @@
+# Document Translation Frontend - Dockerfile
+# Multi-stage build for optimized production
+
+# Build stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY frontend/package*.json ./
+
+# Install dependencies
+RUN npm ci --only=production=false
+
+# Copy source code
+COPY frontend/ .
+
+# Build arguments for environment
+ARG NEXT_PUBLIC_API_URL=http://localhost:8000
+ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
+
+# Build the application
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine AS production
+
+WORKDIR /app
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S nextjs -u 1001
+
+# Copy built assets from builder
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+
+# Set correct permissions
+RUN chown -R nextjs:nodejs /app
+
+USER nextjs
+
+# Environment
+ENV NODE_ENV=production \
+    PORT=3000 \
+    HOSTNAME="0.0.0.0"
+
+EXPOSE 3000
+
+CMD ["node", "server.js"]