added diagrams from https://wiki.geant.org/display/SYS/BRIAN+Architecture

docs/.gitignore

+*.bkp

docs/source/architecture.rst

+System Architecture Notes
+=========================
+
+
+Components Overview
+----------------------
+
+.. only:: drawio
+
+   .. drawio-image:: architecture.drawio
+      :page-name: components
+
+
+Systems Overview
+----------------------
+
+.. only:: drawio
+
+   .. drawio-image:: architecture.drawio
+      :page-name: deployment
+
+Monitoring Schematic
+----------------------
+
+.. only:: drawio
+
+   .. drawio-image:: architecture.drawio
+      :page-name: monitoring

docs/source/index.rst

@@ -16,5 +16,6 @@ Sensu checks for polling the data required by BRIAN.
    :maxdepth: 2
    :caption: Contents:
 
+   architecture
    main
    api