I started SignServer CE from the docker image using
docker run -it --rm -p 8080:8080 -p 8443:8443 -h localhost --name signserver keyfactor/signserver-ce
Then I tried to access http://localhost:8080/signserver/.
Unfortunately the the CSP prevents all resources to be loaded in Chrome, as it is set to https, so disallows self.
So it looks like:
