update readme

README.md

@@ -2,6 +2,14 @@
 
 this a simple rest app and cli app to manage books and collections of books
 
+## Support me
+
+<a href="https://trakteer.id/ajikamaludin" target="_blank"><img id="wse-buttons-preview" src="https://cdn.trakteer.id/images/embed/trbtn-blue-2.png" height="40" style="border:0px;height:40px;" alt="Trakteer Saya"></a>
+
+## Database Tables
+
+![](tables.png?raw=true)
+
 ## Postman Documentation
 
 [Collection](./GRACE.postman_collection.json)