init documentation,

001_documentation/Requirements/REQ0001/index.md

@@ -0,0 +1,28 @@
+---
+tags: mobile,cms
+---
+
+# project overview
+
+This is mobile app project about letter / vocabulary card learning
+
+```mermaid
+mindmap
+  root((ionic_mobile))
+    api_ts
+      Long history
+      ::icon(fa fa-book)
+      Popularisation
+        British popular psychology author Tony Buzan
+    cms
+      On effectiveness<br/>and features
+      On Automatic creation
+        Uses
+            Creative techniques
+            Strategic planning
+            Argument mapping
+    Tools
+      Pen and paper
+      Mermaid
+
+```