server {
    listen 80;
    listen [::]:80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # HTML: revalidate so content updates are seen quickly
    location ~* \.html?$ {
        add_header Cache-Control "public, no-cache";
        try_files $uri $uri/ =404;
    }

    # Versioned/hashed assets: long cache, immutable
    location ~* \.(js|css)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Images and media
    location ~* \.(ico|png|jpg|jpeg|gif|webp|svg|avif)$ {
        expires 30d;
        add_header Cache-Control "public";
        try_files $uri =404;
    }

    # Fonts
    location ~* \.(woff2?|ttf|otf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Default: serve static files, then try directory/index, then 404
    location / {
        add_header Cache-Control "public, no-cache";
        try_files $uri $uri/ /index.html =404;
    }
}