Usage of ./dnsserver:
-api-endpoint value
Specify multiple value for calling multiple API to get result
-domain string
[MUST CHANGE] Base domain for DNS resolution (default "example.com")
-h Print this help
-nameserver string
[MUST CHANGE] Primary NS for SOA must end with period(.) (default "ns.example.com.")
-port int
Port for DNS server to listen to (default 53)
-soa-email string
Email for SOA must end with period(.) (default "john\\n.doe.example.com.")