fixup! Restore timestamp from database files

Author: ohtake

src/server/LevelDBLib.js

@@ -42,7 +42,7 @@ export default class LevelDBLib {
     const pages = getDirectories(path).map(p => LevelDBLib.unescapeNamespace(p.split(sep)[1]));
     return pages.reduce((accumulator, p) => {
       const dbPath = join(path, LevelDBLib.escapeNamespace(p));
-      const directoryCreated = lstatSync(dbPath).mtime;
+      const directoryCreated = lstatSync(dbPath).ctime; // Not correct on Linux
       const latestFileModified = new Date(Math.max(...readdirSync(dbPath).map(name => join(dbPath, name)).map(f => lstatSync(f).mtimeMs)));
       return Object.assign(accumulator, {
         [p]: {