fix(tailwind): Ensure tailwind properly purges unused utility classes (#2485)

.webpack/rules/cssToJavaScript.js

@@ -1,14 +1,26 @@
 const autoprefixer = require('autoprefixer');
+const path = require('path');
+const tailwindcss = require('tailwindcss');
+const tailwindConfigPath = path.resolve('tailwind.config.js');
+const MiniCssExtractPlugin = require('mini-css-extract-plugin');
+const devMode = process.env.NODE_ENV !== 'production';
 
 const cssToJavaScript = {
   test: /\.css$/,
   use: [
-    'style-loader',
+    //'style-loader',
+    devMode ? 'style-loader' : MiniCssExtractPlugin.loader,
     { loader: 'css-loader', options: { importLoaders: 1 } },
     {
       loader: 'postcss-loader',
       options: {
-        plugins: () => [autoprefixer('last 2 version', 'ie >= 11')],
+        postcssOptions: {
+          verbose: true,
+          plugins: [
+            [tailwindcss(tailwindConfigPath)],
+            [autoprefixer('last 2 version', 'ie >= 11')],
+          ],
+        },
       },
     },
   ],