webpack dev server option 이 invalid 하답니다.

package.json

{
  "name": "webpackbasic",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build":"webpack serve --env development"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "react": "^17.0.2",
    "react-dom": "^17.0.2"
  },
  "devDependencies": {
    "@babel/core": "^7.15.0",
    "@babel/preset-env": "^7.15.0",
    "@babel/preset-react": "^7.14.5",
    "@pmmmwh/react-refresh-webpack-plugin": "^0.4.3",
    "babel-loader": "^8.2.2",
    "react-refresh": "^0.10.0",
    "webpack": "^5.50.0",
    "webpack-cli": "^4.8.0",
    "webpack-dev-server": "^4.0.0"
  }
}

webpack.config.js

const path = require("path");
const refreshWebpack = require("@pmmmwh/react-refresh-webpack-plugin");
module.exports = {
    name:"word-relay-setting",
    mode:"development",
    devtool:"eval",
    resolve:{
        extensions:['.js','.jsx']
    },
    entry:{
        app:['./client']
    },
    module: {
        rules:[{
            test: /\.jsx?/,
            loader: 'babel-loader',
            options: {
                presets: [
                    ['@babel/preset-env',{
                        targets:{
                            browsers:['> 1% in KR']
                        },
                        debug:true
                    }],
                    '@babel/preset-react'
                ],
                plugins: [
                    '@babel/plugin-proposal-class-properties',
                    'react-refresh/babel'
                ],
            }
        }],
    },
    plugins:[
        new refreshWebpack()
    ],
    output:{
        path:path.join(__dirname,"dist"),
        filename:'app.js',
        publicPath:'/dist/',
    },
    devServer:{
        hot:true
    }
}

오류 내용

어디가 문제인걸까요?

그리고 항상 질문한거 답변해주셔서 감사합니다.