Clean build folder

Former-commit-id: e47639684bbb1b4d0a15ac8c39dbb0040ae86226 [formerly 3343000db072beb88cec31bb52b139313469f612] [formerly 062dd709613b5784dc8e9b2f327df3cd4c95dc75 [formerly 69d8cd63433f1a56a258a0fb604355a66fe3d20e]]
Former-commit-id: 1c0ebd340266b2020ffba94d2370dbf7c98d1aa6 [formerly fcf840509a0f782b8460fb354aed513dbaa10aa2]
Former-commit-id: bd4e275034627c7ff9c8b60c1405ce6aed912761

assets/build/webpack.dev.conf.js

@@ -39,7 +39,7 @@ module.exports = merge(baseWebpackConfig, {
     // see https://github.com/ampedandwired/html-webpack-plugin
     new HtmlWebpackPlugin({
       filename: config.dev.index,
-      template: 'index.html',
+      template: 'assets/index.html',
       inject: true,
       // necessary to consistently work with multiple chunks via CommonsChunkPlugin
       chunksSortMode: 'dependency',
@@ -69,12 +69,12 @@ module.exports = merge(baseWebpackConfig, {
     new CopyWebpackPlugin([
       {
         from: path.resolve(__dirname, '../static'),
-        to: config.dev.assetsSubDirectory,
+        to: config.assetsSubDirectory,
         ignore: ['.*']
       },
       {
         from: path.resolve(__dirname, '../node_modules/codemirror/mode/*/*'),
-        to: path.join(config.build.assetsSubDirectory, 'js/codemirror/mode/[name]/[name].js')
+        to: path.join(config.assetsSubDirectory, 'js/codemirror/mode/[name]/[name].js')
       }
     ])
   ]