Initial production deployment setup

- Production docker-compose with nginx support
- Nginx configuration for portal.monacousa.org
- Deployment script with backup/restore
- Gitea CI/CD workflow
- Fix CountryFlag reactivity for dropdown flags

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,23 @@
+node_modules
+
+# Output
+.output
+.vercel
+.netlify
+.wrangler
+/.svelte-kit
+/build
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Env
+.env
+.env.*
+!.env.example
+!.env.test
+
+# Vite
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*