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>

.dockerignore

@@ -0,0 +1,47 @@
+# Dependencies
+node_modules
+.pnpm-store
+
+# Build output
+build
+.svelte-kit
+
+# Environment files (we pass these at runtime)
+.env
+.env.*
+!.env.example
+
+# Git
+.git
+.gitignore
+
+# IDE
+.vscode
+.idea
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+
+# Test
+coverage
+.nyc_output
+
+# Docker
+Dockerfile*
+docker-compose*.yml
+.dockerignore
+
+# Supabase local
+supabase/.temp
+supabase/.branches
+
+# Misc
+*.md
+LICENSE