fix exp

app.js

@@ -59,7 +59,9 @@ app.post("/upload", upload.single("file"), (req, res) => {
     const filePath = req.file.filename;
     const expiresAt = Date.now() + EXPIRATION_TIME;
     fileData[filePath] = expiresAt;
-    fs.writeFileSync(META_FILE, JSON.stringify(fileData));
+    fs.writeFile(META_FILE, JSON.stringify(fileData, null, 2), (err) => {
+        if (err) console.error("Gagal menulis ke api.json:", err);
+      });
 
     res.json({
         success: true,