Merge pull request #150 from basecamp/remove-accessory-image

Remove accessory images using tags rather than labels

test/commands/accessory_test.rb

@@ -137,7 +137,7 @@ class CommandsAccessoryTest < ActiveSupport::TestCase
 
   test "remove image" do
     assert_equal \
-      "docker image prune --all --force --filter label=service=app-mysql",
+      "docker image rm --force private.registry/mysql:8.0",
       @mysql.remove_image.join(" ")
   end
 end