You will need to fork the repository, as shown in the image above.
You can get your subdomain from is-not.cool by using the format below, and making the file name be following the of "yoursubdomain".json.
{
"description": "insert ur description",
"owner": {
"repo": "https://github.com/is-not-cool/registration",
"email": "Your email address (If you care about your privacy, you do not have to do this.)",
"discord": "Your discord ID"
},
"record": {
"A": ["1.1.1.1", "1.0.0.1"],
"AAAA": ["2606:4700:4700::1111", "2606:4700:4700::1001"],
"CNAME": "example.com",
"MX": ["mx1.example.com", "mx2.example.com"],
"TXT": ["example_verification=1234567890"],
"NS": ["ns1.example.com", "ns2.example.com"],
"SRV": [
{ "priority": 10, "weight": 60, "port": 5060, "target": "sipserver.example.com" },
{ "priority": 20, "weight": 10, "port": 5061, "target": "sipbackup.example.com" }
]
},
"proxied": false
}