only save 100 photos

routes/upload.js

@@ -1,12 +1,29 @@
 const express = require('express');
 const router = express.Router();
 const multer = require('multer');
-const upload = multer({ dest: 'uploads/' })
+const path = require('path');
+
+// rotating filename
+const nMaxPhotos = 100;
+var photoCounter = 0;
+const storage = multer.diskStorage({
+  destination: function (req, file, cb) {
+    cb(null, './uploads');
+  },
+  filename: function (req, file, cb) {
+    filename = path.parse(file.originalname).name + "-" +
+      (photoCounter % nMaxPhotos).toString().padStart(2, '0') + ".jpg";
+    cb(null, filename);
+    photoCounter += 1;
+  }
+});
+
+const upload = multer({ storage: storage });
 
-// use the same route for both set and get pulse mode
 router.post('/', upload.single('photo'), (req, res) => {
-  console.log(req.headers);
   if (req.file) {
+    console.log("Received photo, saved as:", req.file.path, ", size:",
+      req.file.size);
     res.sendStatus(200);
   } else {
     res.sendStatus(400);