message: fix(techdocs-docs-concepts): TechDocs concept documentation
diff: This page describes concepts that has been introduced with Spotify's
  docs-like-code solution in Backstage.
  +### TechDocs Core Plugin
  +
  +The TechDocs Core Plugin is a MkDocs plugin created as a wrapper around multiple
  +MkDocs plugins and Python Markdown extensions to standardize the configuration
  +of MkDocs used for TechDocs.
  +
  +[TechDocs Core](../../../packages/techdocs-container/techdocs-core/README.md)
  +
  +### TechDocs container
  +
  +The TechDocs container is a Docker container that builds the HTML documentation
  +pages from Python flavoured markdown through MkDocs, including e.g. buttons
  +(more here) and styles.
  +
  +[TechDocs Container](../../../packages/techdocs-container/README.md)
  +
  +### TechDocs publisher (Coming Soon)
  +
  +### TechDocs CLI
  +
  +The TechDocs CLI was created to make it easy to write, generate and preview
  +documentation for publishing. Currently it mostly acts as a wrapper around the
  +TechDocs container and provides a easy to use interface for our docker
  +container.
  +
  +[TechDocs CLI](../../../packages/techdocs-cli/README.md)
  +
  +### TechDocs Reader
  +
  +Documentation generated by TechDocs is generated as static html sites. The
  +TechDocs Reader was therefore created to be able to integrate pre-generated html
  +sites with the Backstage UI.
  +
  +The TechDocs Reader purpose is also to open up the opportunity to integrate
  +TechDocs widgets for a customized full-featured TechDocs experience.
  +([Coming Soon V.2](https://github.com/spotify/backstage/milestone/17))
  +
  +[TechDocs Reader](../../../plugins/techdocs/src/reader/README.md)
  +
  ### Transformers
  -Transformers is an abstraction of functionality that are responsible for
  -different things. The reason to why transformers were introduced is to provide a
  -others to be able to switch out transformers as it fits your TechDocs solution.
  +Transformers is different pieces of functionality used inside the TechDocs
  +Reader. The reason to why transformers were introduced is to provide a way to
  +transform the html content on pre and post render. (e.g. rewrite docs links or
  +modify css)
  -Interested in how transformers work?
  -[Read more here.](../../../plugins/techdocs/src/reader/transformers/README.md)
  +[Transformers API docs](../../../plugins/techdocs/src/reader/transformers/README.md)
  