Fix cleanup in Makefile by removing volumes with docker compose

Updated the `clean` target to use `docker compose down -v`, ensuring that volumes are also removed during cleanup. This prevents leftover volumes from persisting and occupying unnecessary space.

Makefile

@@ -18,7 +18,7 @@ deploy:
 	docker compose -f docker-compose.deploy.yml up -d
 
 clean:
-	docker compose down -
+	docker compose down -v
 
 push-images:
 	docker build -t $(REGISTRY)/backend:$(VERSION) ./backend