Fixed issue with upload doctype

backend/server.js

@@ -108,7 +108,11 @@ app.use(cors({
   origin: CORS_ORIGINS,
   credentials: true
 }));
-app.use(express.json({ limit: '1mb' }));
+// Only parse JSON for requests with application/json content type
+app.use(express.json({
+  limit: '1mb',
+  type: 'application/json'
+}));
 app.use(cookieParser());
 app.use('/uploads', express.static('uploads', {
     dotfiles: 'deny',