his problem is that his ‘server’ application is listening ONLY for a SPECIFIC callers address inside the container, instead of listening for ANY address.
in Mysql this is bind_address = 0.0.0.0, in mongo this is -bind_ip_all… etc…
the sample server is using listen 127.0.0.1:port… which works ok for a locally deployed application,
but inside the container 127.0.0.1 is INSIDE only