Some docker instance may not start because of example config with docker's BUG.

[ncwhale]

Got problem when write docker compose file wrote like the example, it will fail to start when Misskey try to connect to redis services.

This problem cased by docker working with firewalld, when internal: true configed in internal_network, it will block containers connect to each other but can connect from host or internet.

Also the open #7837 may face the same BUG.

It's not Misskey's fail, but the docker's BUG. For better env, consider remove this config line?