Close docker client (#789)

* Close docker client!

* Fix nil dereference

* Update run_context.go

* Bump

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/container/docker_images.go

@@ -15,6 +15,7 @@ func ImageExistsLocally(ctx context.Context, imageName string, platform string)
 	if err != nil {
 		return false, err
 	}
+	defer cli.Close()
 
 	filters := filters.NewArgs()
 	filters.Add("reference", imageName)