Only build HTML for WDS, use our custom builder for actual builds

package.json

@@ -95,7 +95,7 @@
   "scripts": {
     "test": "jest",
     "tox": "sudo docker exec -it -u root iris_mopidy_1 bash -c \"cd /iris && tox\"",
-    "start": "NODE_ENV=development webpack-dev-server",
+    "start": "NODE_ENV=development WEBPACK_DEV_SERVER=1 webpack-dev-server",
     "lint": "eslint src",
     "lint:fix": "eslint src --fix",
     "build": "node build_tools/build.js",

webpack.config.js

@@ -1,4 +1,5 @@
 const isDev = process.env.NODE_ENV !== 'production';
+const isDevServer = process.env.WEBPACK_DEV_SERVER;
 const path = require('path');
 const webpack = require('webpack');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
@@ -90,7 +91,7 @@ const config = {
     new MiniCssExtractPlugin({
       filename: `app${isDev ? '' : '.min'}.css`,
     }),
-    new HtmlWebpackPlugin({ template: './src/index.html' }),
+    ...isDevServer ? [new HtmlWebpackPlugin({ template: './src/index.html' })] : [],
   ],
   watchOptions: {
     poll: true,