Customize Angular Webpack config

1. add customWebpackConfig to angular.json
   

   {
       "projects": {
           "architect": {
               "build": {
                   "options": {
                     "customWebpackConfig": {
             "path": "./custom-webpack.config.js",
             "replaceDuplicatePlugins": true
           },
                   }
               }
           }
       }
   }
   

2. add the extra webpack plugin config in the custom-webpack.config.js
   

   module.exports = {
       module: {
           rules: [
               {
                   test: /\.js$/,
                   loader: 'babel-loader',
                   query: {
                       presets: ['@babel/preset-env'
                       ]
                   }
               }
           ]
       }
   }