server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # Enable gzip compression
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Content-Type-Options "nosniff";

    # Проксирование запросов к бэкенду
    location /api/ {
        proxy_pass http://localhost:8080/;  # Проксируем запросы к бэкенду
        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;

        # Добавляем заголовки CORS (если нужно)
        add_header 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization' always;

        # Обработка предварительных запросов (OPTIONS)
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS';
            add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
            return 204;
        }
    }

    # Обслуживание статики фронтенда
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Кэширование статических файлов
    location /assets {
        expires 1y;
        add_header Cache-Control "public, no-transform";
    }

    # Отключение кэширования для service worker
    location /service-worker.js {
        expires -1;
        add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0";
    }
}