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

    # Static Next.js export: serve the file, its .html twin, or fall back to the
    # SPA shell (the app uses client-side hash routing).
    location / {
        try_files $uri $uri.html $uri/ /index.html;
    }

    # Never cache the HTML shell — so a new deploy (with new chunk hashes) is
    # always picked up immediately and tabs don't load a stale bundle.
    location ~* \.html$ {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        try_files $uri /index.html;
    }

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