Installation issue Kong with Docker

I am having trouble getting Kong to run after installation and am not sure where the problem lies. All steps of the documentation at https://docs.konghq.com/install/docker/ have been thouroughly followed (installed with the two databases, variables set to “kong-postgres-database” resp. “kong-cassandra-database” so that there should be no conflict). Network is there, containers are running.

Also:

grafik

So somehow it is there but not accessible… Anyone has an idea of what is going on?

PS: By the way, if it helps understanding the situation: