Show error message when deploying invalid dockerhub tag about chatbot HOT 2 CLOSED

@webmaster128 Since kubernetes is eventually consistent it's a bit tricky.
But I think we can do 3 things:
1st - check if the image exists on github
2nd - poke the service for status after a timeout (a minute I suppose and report the status)
3rd - introduce a !deploy status command to show all the pods and their deployment status.

Sounds good? I don't want to complicate this too much, but I can see how good feedback is beneficial.

The output you see now is the output of last successful command on kubernetes ( if there were errors on the way - it would report an error and stop execution). It's not super helpful, but gives you an idea that you managed to update the image.

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@webmaster128 I have introduce an image check and also a delayed status report to see what's happening with the pods.

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