$ curl -I
https://nixos.orgHTTP/2 200
cache-control: public, max-age=0, must-revalidate
content-length: 0
content-type: text/html; charset=UTF-8
date: Tue, 05 May 2020 17:07:15 GMT
etag: "4b0b6dde5b33d92ce136260d67c1a9a3-ssl"
strict-transport-security: max-age=31536000
age: 0
server: Netlify
x-nf-request-id: 2bd7e490-586f-4105-8dd2-0fdcacfddf9d-619583