2222 never meant anything — no container of gitea's publishes it, the
software never listens on it, and nobody could say where it came from.
The container's real internal sshd is 22 (gitea's own default, unmodified
— every other module's listens.port already means the container's real
internal port, this one didn't). ports now declares 222:22 directly: 222
is the real, fixed, always-known public git-ssh port, so it needs no
per-node setting to reach — unlike an arbitrary auto-assigned port, this
one has external consumers who already know the number.