chore(guide): added docker system prune command (#25843)

added basic use of docker system prune command, which will help us to clean up disk space.

guide/english/docker/docker-system-prune/index.md

@@ -0,0 +1,22 @@
+---
+title: Docker System Prune
+---
+
+## Docker System Prune
+
+`docker system prune` This command will remove unused data which includes below:
+
+* all stopped containers
+* all networks not used by at least one container
+* all dangling images
+* all build cache
+
+
+The basic usage is:
+
+```
+docker system prune
+```
+
+#### More Information:
+- [Docker CLI docs: System Prune](https://docs.docker.com/engine/reference/commandline/system_prune/)