Fixed an issue where preview images for themes were not loading in preferences. #6363

web/webpack.config.js

@@ -69,7 +69,7 @@ const copyFiles = new CopyPlugin({
     pgadminThemesJson,
     {
       from: './pgadmin/static/scss/resources/**/*.png',
-      to: 'img/[name].[ext]',
+      to: 'img/[name][ext]',
     },
   ],
 });

web/webpack.test.config.js

@@ -30,15 +30,16 @@ module.exports = {
     }),
     new ImageMinimizerPlugin({
       test: /\.(jpe?g|png|gif)$/i,
-      minimizerOptions: {
-        // Lossless optimization with custom option
-        // Feel free to experiment with options for better result for you
+      minimizer: {
+        implementation: ImageMinimizerPlugin.imageminMinify,
+        options: {
           plugins: [
             ['mozjpeg', { progressive: true }],
             ['optipng', { optimizationLevel: 7 }],
             ['pngquant', {quality: [0.75, .9], speed: 3}],
           ],
         },
+      },
     }),
   ],