Add new file

docs/test.md

+# Test markdown documentation
+
+Here is a mermaid graph
+
+```mermaid
+sequenceDiagram
+    participant A as User
+ 	participant H as Intermediary
+	participant OP as Participants
+	A->>H: join_request
+	par to user
+		H->>A: dcnet_info
+    and to participants
+		H->>OP: add_participant
+	end
+```
+
+and here is a note
+
+.. note::
+
+    This document is work in progress.
+
+thats it.