fix: output an error if not cloudflare token provided

cmd/main.go

@@ -15,8 +15,13 @@ func main() {
 		log.Println(err)
 		os.Exit(1)
 	}
+
 	// Init Cloudflare client
 	cloudflareApiToken := os.Getenv("CLOUDFLARE_TOKEN")
+	if len(cloudflareApiToken) == 0 {
+		log.Println("Error: you need to provide a Cloudflare API token")
+		os.Exit(1)
+	}
 	cf := cloudflare.NewApiClient(cloudflareApiToken)
 
 	for _, c := range configs {