chore: missing file fix

cmd/utils.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"context"
+	"net"
+)
+
+func setResolver(addr string) {
+	if _, _, err := net.SplitHostPort(addr); err != nil {
+		// Append the default DNS port
+		addr = net.JoinHostPort(addr, "53")
+	}
+	net.DefaultResolver.PreferGo = true
+	net.DefaultResolver.Dial = func(ctx context.Context, network, address string) (net.Conn, error) {
+		d := net.Dialer{}
+		return d.DialContext(ctx, "udp", addr)
+	}
+}