fix: add logging to cache cleaning

internal/fs_storage.go

@@ -52,6 +52,7 @@ func (fs *FileSystemStorage) WriteFile(path string, file io.ReadCloser) error {
 
 // RemoveUnusedArtifacts cleans away artifacts that have not been used for configurable amount of time
 func (fs *FileSystemStorage) RemoveUnusedArtifacts(ctrl *FileController) {
+	logrus.Info("starting removal of unused artifacts")
 	cacheTime := fs.config.CacheTime
 	maxAccessTime := time.Now().Add(-cacheTime)
 	var err error
@@ -70,6 +71,7 @@ func (fs *FileSystemStorage) RemoveUnusedArtifacts(ctrl *FileController) {
 		}
 		aTime := atime.Get(info)
 		if aTime.Before(maxAccessTime) {
+			logrus.Debugf("removing %s that has not been accessed since %s", path, aTime)
 			err := os.RemoveAll(path)
 			if err != nil {
 				return err