Fix filesystem not working if creation date unavailable (e.g. in NFS mounts)

src/storage/filesystem.rs

@@ -184,7 +184,13 @@ impl FileStorage {
                         name: version_name,
                         hash: hash_str,
                         artifact: Some(artifact_url),
-                        created: Some(entry.metadata()?.created()?.into()),
+                        created: match entry.metadata()?.created() {
+                            Ok(t) => Some(t.into()),
+                            Err(e) => {
+                                log::debug!("Failed to get created date of {}: {}", entry_path.display(), e);
+                                None
+                            }
+                        },
                         downloads: downloads_stat,
                         updates: updates_stat,
                     });