document docker-in-docker limitation (#53)

* document docker-in-docker limitation

* fix typo

Author: bpmct

README.md

@@ -25,5 +25,6 @@ A collection of one-click buttons and scripts for deploying [code-server](https:
 - Deployed containers do not persist, and are often rebuilt
   - Containers can shut down when you are not using them, saving you money
   - All software and dependencies need to be defined in the `Dockerfile` or install script so they aren't destroyed on a rebuild. This is great if you want to have a new, clean environment every time you code
-  - Storage may not be redundant. You may have to use [rclone](https://rclone.org/) to store your filesystem on a cloud service, for info:
+  - Most app platforms do not support running docker or virtual volume mounts in the container.
+  - Storage may not be persistent. You may have to use [rclone](https://rclone.org/) to store your filesystem on a cloud service. Documented below:
 - [📄 Docs for code-server-deploy-container](deploy-container/)