Run PurgeCSS to reduce output css size

package.json

@@ -8,9 +8,11 @@
     "css-loader": "^5.0.0",
     "extract-loader": "^5.1.0",
     "file-loader": "^6.1.1",
+    "glob": "^7.1.7",
     "jquery": "^3.5.1",
     "mini-css-extract-plugin": "^1.1.0",
     "open-iconic": "^1.1.1",
+    "purgecss-webpack-plugin": "^4.0.3",
     "raw-loader": "^4.0.2",
     "url-loader": "^4.1.1",
     "webpack": "latest",

static/.gitignore

 ai.css
 ai.js*
+*.eot
 *.otf
 *.ttf
 *.svg

webpack.config.js

+const glob = require('glob');
 const webpack = require('webpack');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
+const PurgeCSSPlugin = require('purgecss-webpack-plugin');
 
 module.exports = {
     mode: 'production',
@@ -18,6 +20,9 @@ module.exports = {
             jQuery: 'jquery',
         }),
         new MiniCssExtractPlugin(),
+        new PurgeCSSPlugin({
+            paths: glob.sync(__dirname + '/templates/*.tmpl'),
+        }),
     ],
     module: {
         rules: [