Bot Updating Documentation

docs/images/docker-booksonic-air.md

@@ -40,6 +40,10 @@ The architectures supported by this image are:
 
 While this is a more up to date rebase of the original Booksonic server, upgrading in place is not supported and a fresh install has been recommended. Default user/pass is admin/admin
 
+## Read-Only Operation
+
+This image can be run with a read-only container filesystem. For details please [read the docs](https://docs.linuxserver.io/misc/read-only/).
+
 ## Usage
 
 To help you get started creating a container from this image you can either use docker-compose or the docker cli.