The direct answer is you could echo y | launcher cleanup to send “y” early.
The indirect answer is the actual launcher cleanup (after is equivalent is these two commands:
docker container prune --force --filter until=24h
docker image prune --all --force --filter until=24h
and the prompt I think you’re referring to is for removing old postgres data directories:
rm -rf /var/discourse/shared/standalone/postgres_data_old*
You could drop the dependency on launcher and use those commands directly.