add tiny logging after configuration dump

dumper/dumper.go

@@ -3,6 +3,7 @@ package dumper
 import (
 	"encoding/pem"
 	"io/ioutil"
+	"log"
 	"os"
 	"path/filepath"
 
@@ -54,6 +55,8 @@ func Dump(data *StoredData, baseConfig *BaseConfig) error {
 		}
 	}
 
+	log.Println("dumped new certificate data")
+
 	return nil
 }