Load hash based styles in error.html, too

scripts/webpack/webpack.dev.js

@@ -82,6 +82,11 @@ module.exports = merge(common, {
     new MiniCssExtractPlugin({
       filename: "grafana.[name].[hash].css"
     }),
+    new HtmlWebpackPlugin({
+      filename: path.resolve(__dirname, '../../public/views/error.html'),
+      template: path.resolve(__dirname, '../../public/views/error.template.html'),
+      inject: 'false',
+    }),
     new HtmlWebpackPlugin({
       filename: path.resolve(__dirname, '../../public/views/index.html'),
       template: path.resolve(__dirname, '../../public/views/index.template.html'),