server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Static export with trailingSlash: serve dir/index.html, or the .html twin.
    location / {
        try_files $uri $uri/ $uri.html /index.html;
    }

    # Never cache HTML — new deploys (new chunk hashes) are picked up immediately.
    location ~* \.html$ {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }

    # Long-cache immutable, content-hashed build assets.
    location /_next/static/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }
}