adding a placeholder architecture rst file

Issue-ID: CPS-178

Signed-off-by: niamhcore <niamh.core@est.tech>
Change-Id: I54cb3a5f5325773988a12c29eb5ed9fe047bbe3c
diff --git a/docs/architecture.rst b/docs/architecture.rst
new file mode 100644
index 0000000..c613e4f
--- /dev/null
+++ b/docs/architecture.rst
@@ -0,0 +1,5 @@
+..  Copyright (C) 2021 Nordix Foundation
+.. _architecture:
+
+CPS in ONAP Architecture
+--------------------------
\ No newline at end of file