Add full SEO optimization for Spanglish social and language events

- Add comprehensive metadata to root layout with Open Graph, Twitter cards
- Create dynamic sitemap.ts for all pages and events
- Create robots.ts with proper allow/disallow rules
- Add JSON-LD Event structured data to event detail pages
- Add page-specific metadata to events, community, contact, FAQ pages
- Add FAQ structured data schema
- Update footer with local SEO text for Asunción, Paraguay
- Add web manifest for mobile SEO
- Create 404 page with proper noindex
- Optimize image alt text and add lazy loading
- Add NEXT_PUBLIC_SITE_URL env variable
- Add about/ folder to gitignore

backend/.env.example

@@ -11,6 +11,11 @@ DATABASE_URL=./data/spanglish.db
 # JWT Secret (change in production!)
 JWT_SECRET=your-super-secret-key-change-in-production
 
+# Google OAuth (optional - for Google Sign-In)
+# Get your Client ID from: https://console.cloud.google.com/apis/credentials
+# Note: The same Client ID should be used in frontend/.env
+GOOGLE_CLIENT_ID=
+
 # Server Configuration
 PORT=3001
 API_URL=http://localhost:3001