Sendfile

sendfile on;

See also

• Nginx: nginx -t, nginx.conf, /etc/nginx/fastcgi.conf, Nginx Sample Configurations, server, ssl_certificate, redirect, return, rewrite, sendfile, request_uri, server_name, listen, /etc/nginx/snippets/, /etc/nginx/sites-enabled/default

https://docs.nginx.com/nginx/admin-guide/web-server/serving-static-content/#enabling-sendfile