Update README.md

README.md

@@ -1,6 +1,15 @@
 # DELIVER_MAN
 
-## Docker
+## Core Functionality
+
+- View product inventory with current stock levels.
+- Create orders with customer name and order date.
+- Edit order details (customer name, date) and delete orders.
+- Add items to orders, update item quantities or products, and remove items.
+- Move items between orders.
+- Prevent overselling by validating stock on add/update.
+
+## Run via Docker
 
 Run client + server + database: