update Cloud Portal documentation

This is a first version of the updated cloud portal documentation to replace the old technical platform docs. I will continue to update this in subsequent MRs.

docs/cloud-portal/CP_Architecture.md

@@ -7,6 +7,7 @@ This document describes the general architecture of the Cloud Portal (CP) for th
 The CP is a central part of the Helmholtz Cloud. It is the main entrypoint for users to find and access HIFIS services. In the position, the CP has to interact with almost all components of the system. [Figure 1](#img-high-level-system-architecture) shows and overview of the current system and the interaction with other systems.
 
 ![Login](images/Cloud_Portal_Architecture.png)
+
 <a name="img-high-level-system-architecture">**Figure 1:** High-level system architecture</a>
 
 ## Technology