Does this mean heroku docker:release can’t work on CircleCI? I haven’t been able to deploy this way despite being told by one of your support engineers that this is possible, and the error I keep getting is related:
Error response from daemon: Driver btrfs failed to remove root filesystem 965c64a946e9456e7de152d44c839d189e4583108e1de95d25577e1d9ddeaa23: Failed to destroy btrfs snapshot /var/lib/docker/btrfs/subvolumes for 965c64a946e9456e7de152d44c839d189e4583108e1de95d25577e1d9ddeaa23: operation not permitted
Error: failed to remove containers: [965c64a946e9456e7de152d44c839d189e4583108e1de95d25577e1d9ddeaa23]
The heroku docker code relies on this working: https://github.com/heroku/heroku-docker/blob/master/commands/release.js#L128