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

deploy/front-end_nginx.conf

@@ -24,6 +24,9 @@ server {
 
     server_name spanglishcommunity.com www.spanglishcommunity.com;
 
+    # Upload size limit (covers same-origin /api uploads via this vhost)
+    client_max_body_size 20m;
+
     # SSL
     ssl_certificate /etc/letsencrypt/live/spanglishcommunity.com/fullchain.pem;
     ssl_certificate_key /etc/letsencrypt/live/spanglishcommunity.com/privkey.pem;