Initialize logger early, fix error message when symlink addition failed.

internal/backer/newServer.go

@@ -23,6 +23,8 @@ func withServerHeader(next http.Handler) http.Handler {
 
 // NewServer starts new server instance with given config file.
 func NewServer(configPath string) (*http.Server, error) {
+	_ = log.Init("info", "") // Initialize logger with defaults for early logging.
+
 	if err := LoadConfig(configPath); err != nil {
 		return nil, fmt.Errorf("Failed to load config: %w", err)
 	}

internal/backer/utils.go

@@ -100,7 +100,7 @@ func CreateTarGzStream(ctx context.Context, filepaths []string) io.ReadCloser {
 				linkTarget, err = os.Readlink(fpath)
 
 				if err != nil {
-					log.Warnf("Skipping %s: readlink failed: %s", fpath, err)
+					log.Warnf("Skipping %s: readlink failed: %v", fpath, err)
 
 					continue
 				}