typo in example. `init` and `--host=roach1:26357` are swapped.

[ivanchubb]

docs/src/current/_includes/v25.4/start-in-docker/mac-linux-steps.md

Line 141 in 490fbc9

docker exec -it roach1 ./cockroach --host=roach1:26357 init --insecure

Jira issue: DOC-15030