Update : body-parser -> express internal parser.

server/src/app.js

-import bodyParser from "body-parser";
 import cookieParser from "cookie-parser";
 import express from "express";
 import morgan from "morgan";
@@ -19,8 +18,8 @@ app.set("views", path.join(__dirname, "views"));
 
 app.use(helmet());
 app.use(cookieParser());
-app.use(bodyParser.json());
-app.use(bodyParser.urlencoded({ extended: true }));
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
 app.use(morgan("dev"));
 
 // local middleware 사용