Couchbase Server 5.0.1 CE Docker Container doesn't start

https://forums.couchbase.com/t/couchbase-server-4-63-upgrade-to-5-0-1-server-wont-start/15344 

I have a single node couchbase server running 4.6.3, I shut it down and created/deployed a new docker image (using couchbase:community-5.0.1 ) and now the server won’t start. It’s running in a docker container and the output at start up is:

{{Attaching to acmaster_couchbase-server_1 couchbase-server_1 | Waiting 20 seconds for Couchbase service to start couchbase-server_1 | Starting Couchbase Server – Web UI available at http://<ip>:8091 and logs available in /opt/couchbase/var/lib/couchbase/logs couchbase-server_1 | ERROR: Unable to connect to host at http://localhost:8091 couchbase-server_1 | Couchbase server is ready couchbase-server_1 | /entrypoint.sh couchbase-server }}

This is my first upgrade of Couchbase - I could’t find any release specific upgrade instructions on the website; the server automatically upgrades itself at start up?

Here is the cbcollect_info data: https://www.dropbox.com/s/q1odznji8mjv74m/output.zip?dl=01

Any assistance is greatly appreciated.