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

    gzip on;
    gzip_comp_level 6;
    gzip_min_length 1024;
    gzip_types text/plain text/css application/javascript application/json image/svg+xml;

    # Long cache for fingerprint-free static assets; HTML stays revalidated.
    location ~* \.(?:css|js|png|jpe?g|gif|svg|webp|woff2?)$ {
        expires 7d;
        add_header Cache-Control "public, immutable";
        access_log off;
    }

    location = /index.html {
        add_header Cache-Control "no-cache";
    }

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