server {
    listen 80;
    server_name _;

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

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

    # Main page
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Web app manifest
    location = /site.webmanifest {
        default_type application/manifest+json;
        expires 30d;
        add_header Cache-Control "public, immutable";
    }

    # Assets - long cache for images
    location /assets/ {
        expires 30d;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Security headers
    add_header X-Frame-Options SAMEORIGIN always;
    add_header X-Content-Type-Options nosniff always;
}