IP = 104.21.82.154
Content type of robots.txt is text/html!
Look up this url in the url tool
https://instruct.kr/.well-known/acme-challenge: 200 text/html
https://instruct.kr/.well-known/csvm: 200 text/html
https://instruct.kr/.well-known/nostr.json: 200 text/html
https://instruct.kr/.well-known/security.txt: 200 text/html
https://instruct.kr/.well-known/traffic-advice: 200 text/html