osmith submitted this change.

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scripts/docker-cleanup: add "docker system prune"

On build4 this freed up another 8.223GB when I just ran it:

  $ docker system prune
  WARNING! This will remove:
    - all stopped containers
    - all networks not used by at least one container
    - all dangling images
    - all dangling build cache

  Are you sure you want to continue? [y/N]

Change-Id: I98aa5324eaf7cf319625d85bc80d431b89ee50a7
---
M scripts/docker-cleanup.sh
1 file changed, 3 insertions(+), 0 deletions(-)

diff --git a/scripts/docker-cleanup.sh b/scripts/docker-cleanup.sh
index 982ccea..f1ed6f2 100755
--- a/scripts/docker-cleanup.sh
+++ b/scripts/docker-cleanup.sh
@@ -44,3 +44,6 @@
 
 # remove docker buildkit cache
 docker builder prune --all --filter "until=24h" -f
+
+# remove dangling images
+docker system prune -f

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