Static File Caching Disabled

What This Rule Checks

This rule checks if static file caching (expires/Cache-Control headers) is configured.

Why It Matters

Without caching headers, browsers re-download static assets on every visit. Adding `expires` or `Cache-Control` headers for CSS, JS, and images allows browsers to cache them, dramatically reducing page load times for returning visitors.

✗ Bad — Triggers this rule

location /static {
    root /var/www;
    # No caching headers — every visit re-downloads assets
}

✓ Good — Passes this rule

location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff2)$ {
    root /var/www;
    expires 30d;
    add_header Cache-Control "public, immutable";
}

How to Fix

Enable static file caching in Configen's Performance section and set an appropriate cache duration (e.g., 30 days for versioned assets).

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