'npm start' esta dando erro

const path = require('path');
const babiliPlugin = require('babili-webpack-plugin');

let plugins = [];

if (process.env.NODE_ENV =='production'){

    plugins.push(new babiliPlugin())
};

module.exports={

    entry:'./app-src/app.js',
        output: {

            filename: 'bundle.js',
            path: path.resolve(__dirname, 'dist'),
            publicPath: 'dist'
        },


    module:{
        rules:[
                {
                test: /\.js$/,
                exclude: /node_modules/,

                use: {
                    loader: 'babel-loader'
                }    
            }

        ]


    },
    plugins

}

{
  "name": "client",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build-dev": "webpack --config webpack-config.js",
    "build-prod": "cross-env NODE_ENV=production webpack --config webpack-config.js",
    "start": "webpack-dev-server"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "reflect-metadata": "^0.1.10"
  },
  "devDependencies": {
    "babel-core": "^6.25.0",
    "babel-loader": "^7.1.0",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-preset-es2017": "^6.24.1",
    "babili-webpack-plugin": "^0.1.1",
    "cross-env": "^5.0.1",
    "webpack": "^3.1.0",
    "webpack-dev-server": "^2.5.1"
  }
}