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Introduction
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The HelpCenter3.0 is Open Telekom Cloud product developed by Ecosystem squad introducing new approach in the documentation management.
In order to improve documentation exchange between delivery partners and the TSI a new documentation platform and processes 
based on GitOps are introduced with following benefits:

-  Openness
-  Transparency
-  Comprehensive review capabilities
-  Full control during the documentation lifecycle
-  Documentation as a source code

The target of the new platform is to store and maintain all documents in Git. This provides benefits of precise identification of changes
and preventing undesired versions to be published. The process is heavily streamlined. Once, those changes are approved and merged, 
the connected pipelines ensure that the documentation is published fully automated which eases the document auditing and enables users
to see the complete history of changes tracked by git itself.

.. figure:: /_static/images/helpcenter_gitops.png

Solution is completely open source based and HLD is described at https://docs.otc-service.com/system-config/docsportal.html
Implementation is based on:

-  Restructured Text (RST) as source documentation format
-  Gitea/Github as a repository
-  Zuul as a CI/CD engine for workflows
-  Sphinx as a documentation rendering framework (HTML/PDF/...
-  OpenSearch as a search engine
-  Swift object storage as a storage for documentation
-  Pandoc as a documentation converter
-  OTC Infrastructure (ECS, CCE, ELB, ...)

HC3.0 comes with the following features:

-  Support of UMN, API, DEV and other public facing documents
-  PROD and PREPROD documentation portal:

   -  docs.otc.t-systems.com
   -  docs-int.otc.service.com

-  Support of all old HC links redirections
-  Search functionality
-  Mobile-ready UI layout
-  Report issue functionality directly on any page
-  Suggest documentation fix functionality 
-  Consolidation of extra content like blueprints, tools, and libraries for developers 
-  One repository represents one cloud service
-  Each squad can control and manage their documentation independently
-  Automatization and check jobs across whole documentation lifecycle (from import to release)
