add upload config

backend/src/config/upload.ts

@@ -0,0 +1,16 @@
+import path from "path";
+import multer from "multer";
+
+const publicFolder = path.resolve(__dirname, "..", "..", "public");
+export default {
+  directory: publicFolder,
+
+  storage: multer.diskStorage({
+    destination: publicFolder,
+    filename(req, file, cb) {
+      const fileName = new Date().getTime() + path.extname(file.originalname);
+
+      return cb(null, fileName);
+    }
+  })
+};