DNS record for SSH (docker)

i have a docker container which bind the port 2222:22. It’s possible to connect using ssh -T sub.example.com -p 2222. I’m looking for a way to access ssh the container without specify the port number. I thought this could be done with a DNS record.

I set a DNS record SRV _ssh._tcp.sub 5 10022 sub.example.com to my domain in the admin interface of my provider, this does not work.

Is there a way to do that?