server {
    listen 9112;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml application/json application/javascript application/xml+rss application/atom+xml image/svg+xml;

    # Cache estatic assets (JS/CSS/fonts)
    location ~* \.(js|css|woff2?|ttf|otf|eot|svg|ico|png|jpg|jpeg|webp)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Cache YAMLs de protocolos (corta duración para poder actualizarlos)
    location /protocols/ {
        expires 1d;
        add_header Cache-Control "public, must-revalidate";
        try_files $uri =404;
    }

    # PWA: manifest y service worker sin caché
    location ~* (manifest\.json|sw\.js)$ {
        expires off;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        try_files $uri =404;
    }

    # SPA fallback — todas las rutas sirven index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Seguridad básica
    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-Content-Type-Options "nosniff";
    add_header X-XSS-Protection "1; mode=block";
    add_header Referrer-Policy "strict-origin-when-cross-origin";
}