Updated Docker (markdown)

Docker.md

@@ -128,6 +128,15 @@ Modify the variables `images`, `containers` and `services` according to your sys
 With these commands you can do some cleanup of docker images and containers:
 
 ```bash
+# Remove all stopped containers
+# Remove all volumes not used by at least one container
+# Remove all networks not used by at least one container
+# Remove all dangling images
+# [https://docs.docker.com/engine/reference/commandline/system_prune/#usage](https://docs.docker.com/engine/reference/commandline/system_prune/#usage)
+sudo docker system prune 
+
+
+
 # Remove leftover containers
 sudo docker ps -a -f status=exited -q | xargs -r sudo docker rm