zones: use cloudflare's resolver

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/zones/zones.go

@@ -49,9 +49,11 @@ func (m *Zones) ForEachZone(fn func(*Zone)) {
 
 // NewFS builds a [Zones] tree using the given directory
 func NewFS(dir fs.FS, domain string) (*Zones, error) {
+	lockuper := resolver.NewCloudflareLookuper()
+
 	z := &Zones{
 		dir:      dir,
-		resolver: resolver.SystemResolver(true),
+		resolver: resolver.NewResolver(lockuper),
 		domain:   domain,
 	}