Update readme with possible classes

README.md

@@ -53,6 +53,18 @@ This will launch a local development server, and you can access the app in your
 3. Click the "Classify trash" button to initiate the classification process.
 4. The classified image will be displayed in the right column.
 
+## Possible Classes
+
+The app can classify waste into the following classes:
+
+- Cardboard
+- Compost
+- Glass
+- Metal
+- Paper
+- Plastic
+- Trash
+
 ## Dependencies
 
 - Streamlit