Question on using EventStore v6 preview under docker

I am attempting to use the EventStore v6 Preview 1 docker image (6.0.0-preview1-buster-slim) as part of our integration testing.

The image is run under docker with port 2113 being mapped for all the HTTP traffic.

Previous to v6 this setup has been working successfully however since attempting to using v6 I am now getting SSL Connection Errors when doing a GET on the ping route ( I have also tried to access the UI via a web browser with no joy either (The site cannot be reached).

I have set the container to run Event Store in dev mode with the --dev flag.

Is there anything I am missing in my setup to allow me to talk to the ES container from outside docker over HTTPS?

Any help on this would be much appreciated.