docs: added further hints regarding scss errors

Author: mfranzke

README.md

@@ -33,6 +33,7 @@ DB UI Core provides robust HTML UI components, reusable visual styles, and power
 - [Getting started](docs/getStarted.adoc)
 - [GitHub - DB UI Core](https://github.com/db-ui/core/)
 - [Hosted version of DB UI Core living styleguide](https://db.de/db-ui)
+- [Migrating guide from version 1 of DB UI Core to version 2](docs/migrationGuide.adoc#user-content-db-ui-core-2-0-0-migration-guide)
 
 ## Core principals
 
@@ -107,6 +108,25 @@ Please mind the [conventions for git commits](/docs/conventions.adoc#user-conten
 This is only the first version of our framework and we really want your feedback - either within the <a href="https://db.de/krnm74" target="_blank" rel="noopener noreferrer">DB UI Channel by Web Dev Community in Microsoft Teams (only available DB internally)</a>, or directly at [[email protected]](mailto:[email protected]). <!-- markdownlint-disable MD033 -->
 We're particularly keen to add as many examples to the behaviours as possible, to further clarify them.
 
+## FAQ
+
+### Our `scss` / `sass` build doesn't work any more after migrating from version 1 of DB UI Core.
+
+In case that you're retrieving any errors like the following, please check for whether you've [provided the location of your `node_modules` folders path to your sass compiler](docs/migrationGuide.adoc#user-content-db-ui-core-2-0-0-migration-guide):
+
+```
+./src/styles.scss - Error: Module build failed (from ./node_modules/mini-css-extract-plugin/dist/loader.js):
+ModuleBuildError: Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
+SassError: Can't find stylesheet to import.
+╷
+│ @use "@csstools/normalize.css/normalize.css";
+│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+╵
+node_modules\@db-ui\core\sources\css\enterprise\db-ui-core.scss 7:1 @import
+node_modules\@db-ui\core\sources\css\enterprise\db-ui-core-include.scss 4:9 @import
+src\styles.scss 5:9 root stylesheet
+```
+
 ## Deutsche Bahn brand
 
 As we'd like to perfectly support our users and customers on their digital journey, the usage of Deutsche Bahn brand and trademarks are bound to clear guidelines and restrictions even when being used with the code that we're providing with this product; Deutsche Bahn fully reserves all rights and ownership regarding the Deutsche Bahn brand, even though that we're providing the code of DB UI products free to use and release it under the Apache 2.0 license.