Add docker plugin extra_ports usage example

[piotrromanowski]

• Following the PR to add extra_ports parameter to docker plugin,
  this change adds an example of how extra_ports could be used.
  This is a contrived example, but demonstrates the functionality.

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[briancain]

Hey there @piotrromanowski ! Thanks for taking the time to update the waypoint examples repo. I think generally we are trying to keep these platform examples as simple as possible, and so I don't think it makes sense to modify the python example with additional ports to expose. Given the simple nature of the config option, I think this will be covered enough through documentation on the website.

That being said, on your other PR you mentioned that sometimes additional ports could be used for debugging. If you had an example app that demonstrated this, I think that would be a better example of this option as its own project. Let me know what you think!

[piotrromanowski]

Hey there @piotrromanowski ! Thanks for taking the time to update the waypoint examples repo. I think generally we are trying to keep these platform examples as simple as possible, and so I don't think it makes sense to modify the python example with additional ports to expose. Given the simple nature of the config option, I think this will be covered enough through documentation on the website.

That being said, on your other PR you mentioned that sometimes additional ports could be used for debugging. If you had an example app that demonstrated this, I think that would be a better example of this option as its own project. Let me know what you think!

Ahh that totally makes sense. I can change the PR to add an extra_ports debug example. I can also just drop the PR if it seems unnecessary, nbd 😅

[briancain]

Ahh that totally makes sense. I can change the PR to add an extra_ports debug example. I can also just drop the PR if it seems unnecessary, nbd

Cool, not a problem! Yeah I'd say close it, and later if you have a good functional example of the debug port, I think it could make for a good example alongside this one! 😄 I could see it going in the features example folder I had mentioned in #58 for showing off more complicated use-cases.