standardize http/https ports in nginx config

nextcloud/README.md

@@ -20,3 +20,11 @@ docker run \
 --volume /var/run/docker.sock:/var/run/docker.sock:ro \
 nextcloud/all-in-one:latest
 ```
+
+## Uninstall
+
+```bash
+docker stop $(docker ps -a -q)
+docker system prune
+docker volume prune -a -f
+```