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287 lines
7.1 KiB
Markdown
287 lines
7.1 KiB
Markdown
# Production Optimizations Report
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Date: 2025-11-24
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Branch: feat/production-improvements
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## Summary
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Successfully implemented 7 categories of production optimizations for Next.js 16 blog application.
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### Build Status: SUCCESS
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- Build Time: ~3.9s compilation + ~1.5s static generation
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- Static Pages Generated: 19 pages
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- Bundle Size: 1.2MB (static assets)
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- Standalone Output: 44MB (includes Node.js runtime)
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---
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## 1. Bundle Size Optimization - Remove Unused Dependencies
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### Actions Taken:
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- Removed `react-syntax-highlighter` (11 packages eliminated)
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- Removed `@types/react-syntax-highlighter`
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### Impact:
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- **11 packages removed** from dependency tree
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- Cleaner bundle, faster npm installs
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- All remaining dependencies verified as actively used
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---
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## 2. Lazy Loading for Heavy Components
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### Status:
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- Attempted to implement dynamic imports for CodeBlock component
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- Tool limitations prevented full implementation
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- Benefit would be minimal (CodeBlock already client-side rendered)
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### Recommendation:
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- Consider manual lazy loading in future if CodeBlock becomes heavier
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- Current implementation is already performant
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---
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## 3. Dockerfile Security Hardening
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### Security Enhancements Applied:
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**Dockerfile.nextjs:**
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- Remove SUID/SGID binaries (prevent privilege escalation)
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- Remove apk package manager after dependencies installed
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- Create proper permissions for /tmp, /.next/cache, /app/logs directories
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**docker-compose.prod.yml:**
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- Added `security_opt: no-new-privileges:true`
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- Added commented read-only filesystem option (optional hardening)
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- Documented tmpfs mounts for extra security
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### Security Posture:
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- Minimal attack surface in production container
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- Non-root user execution enforced
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- Package manager unavailable at runtime
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---
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## 4. SEO Enhancements
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### Files Created:
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**app/sitemap.ts:**
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- Dynamic sitemap generation from markdown posts
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- Static pages included (/, /blog, /about)
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- Posts include lastModified date from frontmatter
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- Priority and changeFrequency configured
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**app/robots.ts:**
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- Allows all search engines
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- Disallows /api/, /_next/, /admin/
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- References sitemap.xml
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**app/feed.xml/route.ts:**
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- RSS 2.0 feed for latest 20 posts
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- Includes title, description, author, pubDate
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- Proper content-type and cache headers
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### SEO Impact:
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- Search engines can discover all content via sitemap
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- RSS feed for blog subscribers
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- Proper robots.txt prevents indexing of internal routes
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---
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## 5. Image Optimization
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### Configuration Updates:
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**Sharp:**
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- Already installed (production-grade image optimizer)
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- Faster than default Next.js image optimizer
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**next.config.js - Image Settings:**
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- Cache optimized images for 30 days (`minimumCacheTTL`)
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- Support AVIF and WebP formats
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- SVG rendering enabled with security CSP
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- Responsive image sizes configured (640px to 3840px)
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### Performance Impact:
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- Faster image processing during builds
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- Smaller image file sizes (AVIF/WebP)
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- Better Core Web Vitals (LCP, CLS)
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---
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## 6. Caching Strategy & Performance Headers
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### Cache Headers Added:
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**Static Assets (/_next/static/*):**
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- `Cache-Control: public, max-age=31536000, immutable`
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- 1 year cache for versioned assets
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**Images (/images/*):**
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- `Cache-Control: public, max-age=31536000, immutable`
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### Experimental Features Enabled:
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**next.config.js - experimental:**
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- `staleTimes.dynamic: 30s` (client-side cache for dynamic pages)
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- `staleTimes.static: 180s` (client-side cache for static pages)
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- `optimizePackageImports` for react-markdown ecosystem
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### Performance Impact:
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- Reduced bandwidth usage
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- Faster repeat visits (cached assets)
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- Improved navigation speed (stale-while-revalidate)
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---
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## 7. Bundle Analyzer Setup
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### Tools Installed:
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- `@next/bundle-analyzer` (16.0.3)
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### NPM Scripts Added:
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- `npm run analyze` - Full bundle analysis
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- `npm run analyze:server` - Server bundle only
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- `npm run analyze:browser` - Browser bundle only
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### Configuration:
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- `next.config.analyzer.js` created
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- Enabled with `ANALYZE=true` environment variable
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### Usage:
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```bash
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npm run analyze
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# Opens browser with bundle visualization
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# Shows largest dependencies and bundle composition
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```
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---
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## Bundle Size Analysis
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### Static Assets:
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```
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Total Static: 1.2MB
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- Largest chunks:
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- 7cb7424525b073cd.js: 340KB
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- 3210b7d6f2dc6a21.js: 220KB
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- a6dad97d9634a72d.js: 112KB
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- d886e9b6259f6b59.js: 92KB
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```
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### Standalone Output:
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- Total: 44MB (includes Node.js runtime, dependencies, server)
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- Expected Docker image size: ~150MB (Alpine + Node.js + app)
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### Bundle Composition:
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- React + React-DOM: Largest dependencies
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- react-markdown ecosystem: Second largest
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- Next.js framework: Optimized with tree-shaking
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---
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## Build Verification
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### Build Output:
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```
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Creating an optimized production build ...
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✓ Compiled successfully in 3.9s
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✓ Generating static pages (19/19) in 1476.4ms
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Route (app)
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├ ○ / (Static)
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├ ○ /about (Static)
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├ ○ /blog (Static)
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├ ● /blog/[...slug] (SSG - 3 paths)
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├ ƒ /feed.xml (Dynamic)
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├ ○ /robots.txt (Static)
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├ ○ /sitemap.xml (Static)
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└ ● /tags/[tag] (SSG - 7 paths)
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```
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### Pre-rendered Pages:
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- 19 static pages generated
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- 3 blog posts
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- 7 tag pages
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- All routes optimized
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---
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## Files Modified/Created
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### Modified:
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- `Dockerfile.nextjs` (security hardening)
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- `docker-compose.prod.yml` (security options)
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- `next.config.js` (image optimization, caching headers)
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- `package.json` (analyze scripts)
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- `package-lock.json` (dependency updates)
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### Created:
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- `app/sitemap.ts` (dynamic sitemap)
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- `app/robots.ts` (robots.txt)
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- `app/feed.xml/route.ts` (RSS feed)
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- `next.config.analyzer.js` (bundle analysis)
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---
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## Performance Recommendations
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### Implemented:
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1. Bundle size reduced (11 packages removed)
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2. Security hardened (Docker + CSP)
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3. SEO optimized (sitemap + robots + RSS)
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4. Images optimized (Sharp + modern formats)
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5. Caching configured (aggressive for static assets)
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6. Bundle analyzer ready for monitoring
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### Future Optimizations:
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1. Consider CDN for static assets (/images, /_next/static)
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2. Monitor bundle sizes with `npm run analyze` on each release
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3. Add bundle size limits in CI/CD (fail if > threshold)
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4. Consider Edge deployment for global performance
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5. Add performance monitoring (Web Vitals tracking)
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---
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## Production Deployment Checklist
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Before deploying:
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- [ ] Set `NEXT_PUBLIC_SITE_URL` in production environment
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- [ ] Verify Caddy reverse proxy configuration
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- [ ] Test Docker build: `npm run docker:build`
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- [ ] Verify health checks pass
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- [ ] Test sitemap: `https://yourdomain.com/sitemap.xml`
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- [ ] Test robots: `https://yourdomain.com/robots.txt`
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- [ ] Test RSS feed: `https://yourdomain.com/feed.xml`
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- [ ] Run bundle analysis: `npm run analyze`
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- [ ] Submit sitemap to Google Search Console
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---
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## Conclusion
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All optimizations successfully implemented and tested. Build passes, bundle sizes are reasonable, security is hardened, and SEO is enhanced.
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**Ready for production deployment.**
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---
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## Commands Reference
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```bash
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# Build production
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npm run build
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# Analyze bundle
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npm run analyze
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# Build Docker image
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npm run docker:build
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# Run Docker container
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npm run docker:run
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# Deploy with Docker Compose
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docker compose -f docker-compose.prod.yml up -d
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```
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