readme update

README.md

@@ -65,3 +65,20 @@ docker compose logs -f
 ```bash
 docker compose ps
 ```
+
+## Cleaning Up Images
+
+Remove dangling images (images tagged as `<none>`):
+```bash
+docker image prune
+```
+
+Remove all unused images:
+```bash
+docker image prune -a
+```
+
+Preview what would be removed:
+```bash
+docker image prune --dry-run
+```