refactor: simplify explanation for exposed ports for httpGet in probes

[BoboTheBarbar]

I think there is no reason to illustrate an exposed containerport 80, since it would obfuscate that there is no reason for this port to be exposed.

[dgkanatsios]

sorry, what's wrong with exposing the default nginx port?

[BoboTheBarbar]

sorry, what's wrong with exposing the default nginx port?

There is nothing wrong with exposing it. But the task requires to run a readyness probe and verify the port 80 is in use.
It is an educational detail to show a student, that port 80 doesn't have to be exposed, since the readiness probe runs within the container.
If we would expose port 80 on the pod, this detail would be obfuscated. I will clarify that in the comment a bit more in another commit.

[BoboTheBarbar]

New configuration has been tested manually