Move Webpack build to the same Maven module from which it is invoked (#9823)

postcss.config.js

@@ -0,0 +1,12 @@
+module.exports = {
+  parser: "postcss-scss",
+  plugins: {
+    "postcss-preset-env": {
+      stage: false,
+      features: {
+        "media-query-ranges": true,
+      },
+      preserve: false,
+    },
+  },
+};