admin-apps/build/webpack.dev.config.js

const CopyWebpackPlugin = require('copy-webpack-plugin')
const copyToApps = require('./copyPlugins')
const htmlPluginsArr = require('./htmlPlugins')
const path = require('path')
const entrys = require('./jsEntry')
function resolve (dir) {
    return path.resolve(__dirname, '../', dir)
}

module.exports = {
    mode: 'production',
    watch: true,
  entry: entrys,

  output: {
    path: resolve('.tmp'),
    filename: '[name].js'
  },
  devServer: {
      hot: true,
      port: 9000,
      contentBase: false
  },
  module: {
    rules: [
      { test: /\.js$/, exclude: /node_modules/, loader: "babel-loader" }
    ]
  },
  plugins: [
    new CopyWebpackPlugin([
      ...copyToApps('statics'),
      ...copyToApps('.tmp/js'),
    ]),
    ...htmlPluginsArr
  ]
}