docs: Add design schemas

README.md

@@ -16,6 +16,9 @@
     - [2024/10/06](#20241006)
       - [Workflow](#workflow)
     - [2024/10/07](#20241007)
+      - [The choice of the front end framework](#the-choice-of-the-front-end-framework)
+    - [2024/10/08](#20241008)
+    - [2024/10/09](#20241009)
 <!--toc:end-->
 
 A tricount like expense-sharing system written in Go
@@ -318,3 +321,12 @@ something representable that I can show to a future interviewer.
 Gitea action setup ! 🎉🎉🎉
 
 Next step is to run some check and build and test!
+
+### 2024/10/09
+
+No code for today neither. But I did some design for the user story and
+the database model design.
+
+![Core user story part 1](./docs/howmuch_us1.drawio.png)
+
+![Database model](./docs/howmuch.drawio.png)