server {
    listen 5173;
    server_name _;

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

    # --- Security headers ---
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "no-referrer" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    # CSP разрешает только свои ресурсы + Google Fonts + ws к backend.
    # self + 'unsafe-inline' для стилей нужен Vite-сборке. noVNC загружается
    # как npm-пакет, поэтому внешние CDN больше не нужны.
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data:; connect-src 'self' ws: wss:; frame-ancestors 'self';" always;

    location / {
        try_files $uri /index.html;
    }

    location /api/ {
        proxy_pass http://backend:8000/;
        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_http_version 1.1;
        # Для websocket-прокси VNC-консоли.
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_read_timeout 86400s;
        proxy_send_timeout 86400s;
    }
}