002 Starting-Project
https://github.com/mschwarzmueller/nextjs-complete-guide-course-resources/blob/main/attachments/03-routing-rendering/01-starting-project.zip

005 dummy-news.js
https://github.com/mschwarzmueller/nextjs-complete-guide-course-resources/blob/main/code/03-routing-rendering/04-not-found/dummy-news.js

005 main-header.js
https://github.com/mschwarzmueller/nextjs-complete-guide-course-resources/blob/main/code/03-routing-rendering/04-not-found/components/main-header.js

008 news.js
https://github.com/mschwarzmueller/nextjs-complete-guide-course-resources/blob/main/code/03-routing-rendering/06-default-page/lib/news.js

020 page.js
https://github.com/mschwarzmueller/nextjs-complete-guide-course-resources/blob/main/code/03-routing-rendering/15-route-groups/app/(marketing)/page.js

022 Middleware-Documentation
https://nextjs.org/docs/app/building-your-application/routing/middleware