Exclude filerobot from minification (fix #573)

Signed-off-by: Varun Patil <varunpatil@ucla.edu>

webpack.js

@@ -1,6 +1,7 @@
 const webpackConfig = require('@nextcloud/webpack-vue-config')
 const WorkboxPlugin = require('workbox-webpack-plugin')
 const path = require('path')
+const TerserPlugin = require('terser-webpack-plugin')
 
 const buildMode = process.env.NODE_ENV
 const isDev = buildMode === 'development'
@@ -31,4 +32,20 @@ webpackConfig.plugins.push(
     })
 );
 
+// Exclusions from minification
+const minifyExclude = [
+    /filerobot-image-editor/,
+]
+
+webpackConfig.optimization.minimizer[0] =
+    new TerserPlugin({
+        exclude: minifyExclude,
+        terserOptions: {
+            output: {
+                comments: false,
+            }
+        },
+        extractComments: true,
+    });
+
 module.exports = webpackConfig