Webpack: only use [chunkhash] and [contenthash] in production builds

https://webpack.js.org/guides/build-performance/#avoid-production-specific-tooling

webpack/production.js

@@ -17,6 +17,13 @@ module.exports = merge(sharedConfig, {
   devtool: 'source-map',
   stats: 'errors-warnings',
   bail: true,
+
+  output: {
+    filename: 'packs/js/[name]-[chunkhash].js',
+    chunkFilename: 'packs/js/[name]-[chunkhash].chunk.js',
+    hotUpdateChunkFilename: 'packs/js/[id]-[contenthash].hot-update.js',
+  },
+
   optimization: {
     minimize: true,
   },

webpack/shared.js

@@ -52,9 +52,9 @@ module.exports = {
   },
 
   output: {
-    filename: 'packs/js/[name]-[chunkhash].js',
-    chunkFilename: 'packs/js/[name]-[chunkhash].chunk.js',
-    hotUpdateChunkFilename: 'packs/js/[id]-[contenthash].hot-update.js',
+    filename: 'packs/js/[name].js',
+    chunkFilename: 'packs/js/[name].chunk.js',
+    hotUpdateChunkFilename: 'packs/js/[id].hot-update.js',
     path: output.path,
     publicPath: join(FE_SUBDIRECTORY, '/'),
   },