modify backend package.json

@@ -11,15 +11,18 @@
     "crypto-js": "^4.0.0",
     "debug": "~2.6.9",
     "ejs": "^3.1.3",
+    "excel4node": "^1.7.2",
     "express": "~4.16.1",
     "express-session": "^1.17.1",
     "formidable": "^1.2.2",
     "http-errors": "~1.6.3",
     "moment": "^2.26.0",
     "morgan": "~1.9.1",
+    "multer": "^1.4.2",
     "mysql": "^2.18.1",
     "passport": "^0.4.1",
     "pug": "^3.0.0",
-    "request": "^2.88.2"
+    "request": "^2.88.2",
+    "xlsx": "^0.16.2"
   }
 }