server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    client_max_body_size 512M;

    # React SPA — 모든 경로를 index.html로 fallback
    location / {
        try_files $uri $uri/ /index.html;
    }

    # 백엔드 API 프록시
    location /api/ {
        proxy_pass         http://platform-backend:3201/api/;
        proxy_set_header   Host              $host;
        proxy_set_header   X-Real-IP         $remote_addr;
        proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;
    }

    # 정적 에셋 캐시
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|webp|woff2?)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # gzip 압축
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;
    gzip_min_length 1000;
}