Find out the web server of a website

Run:

curl -I https://hey.com/

Example output:

HTTP/2 301
server: nginx
date: Sun, 04 Sep 2022 21:06:06 GMT
content-type: text/html
content-length: 162
location: https://www.hey.com/
strict-transport-security: max-age=63072000; includeSubdomains; preload