feat: initial commit — World Cup stats app with pnpm, Traefik, Docker

Full-stack World Cup web app (1930–2026):
- Next.js 16 + TailwindCSS 4 + GraphQL Yoga + Apollo Client 4 + Drizzle + PostgreSQL 16
- 23 tournaments synced from openfootball/worldcup.json (matches, goals, teams, stadiums, squads, standings)
- Pages: home (live), groups, stats, history, search, /tournaments/[year], /teams/[slug], /players/[name]
- Live match detection via isLive() + Apollo 60 s poll
- pnpm with node-linker=hoisted for Docker compatibility
- docker-compose.yml with Traefik labels (HTTPS redirect, TLS, security middleware)
- docker-compose.dev.yml for local dev (DB only, port 5432 exposed)
- Dockerfile: multi-stage pnpm build, standalone Next.js output, sync script bundled
- .env.example with all required variables documented
- Comprehensive README with local dev, deployment, schema, and GraphQL API reference

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

components/team-flag.tsx

@@ -0,0 +1,20 @@
+import { getIso } from '@/lib/iso-codes'
+
+interface Props {
+  name: string
+  iso2?: string | null
+  size?: 'sm' | 'md' | 'lg' | 'xl'
+  className?: string
+}
+
+const sizes = { sm: 'text-lg', md: 'text-2xl', lg: 'text-4xl', xl: 'text-[60px]' }
+
+export function TeamFlag({ name, iso2, size = 'md', className = '' }: Props) {
+  const code = iso2 ?? getIso(name)
+  return (
+    <span
+      className={`fi fi-${code} rounded-sm inline-block flex-shrink-0 ${sizes[size]} ${className}`}
+      title={name}
+    />
+  )
+}