server {
    listen 80;
    server_name _;

    root /var/www/gallery;
    index index.html;

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

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

    # Static assets: cache aggressively
    location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg|woff2?)$ {
        expires 7d;
        add_header Cache-Control "public, immutable";
    }

    # HTML: no cache so regenerated galleries are picked up immediately
    location ~* \.html$ {
        expires -1;
        add_header Cache-Control "no-store";
    }

    location / {
        try_files $uri $uri/ $uri/index.html =404;
    }

    # Deny access to hidden files
    location ~ /\. {
        deny all;
    }
}