Use chokidar to bundle css files

buildtools/build.sh

@@ -19,3 +19,4 @@ buildtools/update_type_info.sh app
 webpack --config $WEBPACK_CONFIG --mode production
 webpack --config buildtools/webpack.check.js --mode production
 webpack --config buildtools/webpack.api.config.js --mode production
+cat app/client/*.css app/client/*/*.css > static/bundle.css

buildtools/webpack.config.js

@@ -1,11 +1,7 @@
 const fs = require('fs');
 const MomentLocalesPlugin = require('moment-locales-webpack-plugin');
-const MergeIntoSingleFilePlugin = require('webpack-merge-and-include-globally');
 const { ProvidePlugin } = require('webpack');
 const path = require('path');
-const glob = require('glob');
-
-const cssFiles = glob.sync('app/client/**/*.css');
 
 // Get path to top-level node_modules if in a yarn workspace.
 // Otherwise node_modules one level up won't get resolved.
@@ -21,7 +17,6 @@ module.exports = {
     boot: "app/client/boot",
     billing: "app/client/billingMain",
     form: "app/client/formMain",
-    css: new Set(cssFiles),
     // Include client test harness if it is present (it won't be in
     // docker image).
     ...(fs.existsSync("test/client-harness/client.js") ? {
@@ -92,12 +87,6 @@ module.exports = {
       process: 'process',
       Buffer: ['buffer', 'Buffer']
     }),
-    new MergeIntoSingleFilePlugin({
-      files: {
-        "bundle.css": cssFiles
-      },
-      chunks: "css"
-    }),
     // To strip all locales except “en”
     new MomentLocalesPlugin()
   ],