TS Starter: Webpack config add PostCSS loader

webpack.config.js.diff

rules: [
    {
        test: /\.js$/,
        exclude: /node_modules/,
        use: ['babel-loader']
    },
    {
        test: /\.ts$/,
        use: 'ts-loader',
        exclude: /node_modules/
    },
+   {
+       test: /\.p?(css)$/i,
+       oneOf: [
+           {
+               resourceQuery: /module/,
+               use: [
+                   MiniCssExtractPlugin.loader,
+                   {
+                       loader: 'css-loader',
+                       options: {
+                           url: false,
+                           sourceMap: env.production !== true,
+                           importLoaders: 1,
+                           modules: {
+                               localIdentName: '[local]_[hash:base64:5]'
+                           }
+                       }
+                   },
+                   {
+                       loader: 'postcss-loader',
+                       options: {
+                           sourceMap: env.production !== true
+                       }
+                   }
+               ]
+           },
+           {
+               use: [
+                   MiniCssExtractPlugin.loader,
+                   {
+                       loader: 'css-loader',
+                       options: {
+                           url: false,
+                           sourceMap: env.production !== true,
+                           importLoaders: 1,
+                           modules: false
+                       }
+                   },
+                   {
+                       loader: 'postcss-loader',
+                       options: {
+                           sourceMap: env.production !== true
+                       }
+                   }
+               ]
+           }
+       ]
+   }
]