Added Notes

Notes.md

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+# Notes
+
+
+## Todo's
+
+* Create REST API
+* Create Persistence
+    - Change userpersitence to an iterator over a csv file, that does not require to keep the whole database in ram
+    - Allow integrity check for duplicate pin numbers, rfid etc.
+* Use text templates for Display
+* Rebuild WEB UI -> Mobile first approach. More limited features but therefore easy to understand
+------
+
+## Log
+### 13.02.2022
++ Finally I found a solution for using a json document with variable file size. Import and export works well - till you have more than 300 users.