Well, that line was there in an earlier startup of the docker container. I’ve restarted it numerous times since then and it no longer logs the LetsEncryptRegisterListener ... line but does have the keyStore and keyStorePassword changes I made to catalina.sh. So I will try rolling back those changes and see if I can get it to load the cacert as before, then see if I can replace that file with the one which has my cert in it.
Thanks again.