Add about page

[pstackebrandt]

As a recruiter I want to measure the quality, structure and technologies used to build the website. So, I can approve dev skills of Peter.
As a learner I want to understand how the website is built and learn how to build parts (technology, tools, measurements to secure quality).

• Add a page that informs about the technologies, tools, places, ideas.
• plain design and content for now
• Content should be fast creatable and maintainable by use of AI.