add some documentation structure

docs/concepts-and-configurations/documentation-structure.md

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+---
+title: Documentation Structure
+order: 1
+summary: >-
+  How our documentation is organized and what we do to balance ease of writing and understanding.
+---
+
+!!! info "ToDo"
+
+    This section needs updating
+
+- Docs should be english
+- Guides are for step-by-step things
+  - Guides always have a "Goal" explicitly formulated
+- Concepts and Configuration aim to make readers understand something in detail
+

docs/concepts-and-configurations/index.md

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+---
+title: Concepts and Configurations
+order: 0
+sidebar_title: Start
+summary: >-
+  Concepts and configurations is a selection of how we organize and manage our infrastructure.  You can find here how processes are planned, how services are expected to integrate with each other and how they are configured.
+
+---
+
+

docs/concepts-and-configurations/who-we-are.md

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+---
+title: Who We Are and What We Do
+---
+
+We are the infrastructure team of the [Chaos Computer Club Hansestadt Hamburg](https://hambugr.ccc.de).
+ We operate all the infrastructure related to that club in a fun, sustainable and cooperative way.
+We are always open for new ideas and discussions and you can reach us at [infra@hamburg.ccc.de](mailto:infra@hamburg.ccc.de) or directly in the hackerspace.
+
+In doing so we operate on common values of **trust**, **fun**, helping each other learn, and of course the [Hacker Ethics](https://www.ccc.de/en/hackerethics).
+
+Topics that interest us and which we engage in:
+
+- Networking in our local club (See [Networking in Z9](./networking_in_z9.md))
+- Operating our own bare metal servers in Club and our local data center (See [Managed Resources](./managed-resources.md))
+- Providing services for our members and groups (See [Managed Resources](./managed-resources.md))
+- Hacking on (self hosted) Smart-Home services and automation for our space (See [Club Automation](./club-automation.md))
+