"Could not get a response" from Postman, fetching Express server

The Express server should be running on port 5000. It apparently seems to be running because I do see Example app listening on port 5000 three times when I start it up with k8s.

I’m trying to get a response from it by doing the following in Postman, some of which are entirely redundant (localhost vs 127.0.0.1)… just a simple GET:

localhost:5000
localhost:5000/
localhost/
127.0.0.1:5000
127.0.0.1:5000/
127.0.0.1/
192.168.99.100:5000 //minikube ip
192.168.99.100:5000/
192.168.99.100/
172.17.0.7:5000 //one of the pod ips
172.17.0.7:5000/
172.17.0.7/

Tried prefixed with http:// and https://. Tried a number of things I knew wouldn’t work, but just desperate at this point to figure out what is going on.