add port argument for rasa interactive

[erohmensing]

Description of Problem:
We can currently run a rasa server and a rasa x server on a specified port instead of the default, but there is no option to do this for rasa interactive. https://forum.rasa.com/t/how-to-run-rasa-interactive-in-a-different-port/10517/6

Overview of the Solution:

• Add a -p, --port argument to rasa interactive
• Serve the application on the port if given, or on the DEFAULT_SERVER_PORT if the argument is not passed (where it currently runs)

Definition of Done:

• Argument is added
• Functionality with and without -p argument defined manually tested
• Feature mentioned in the changelog

[pnandhini11]

Hi, I am interested to take up this issue and work on it. Pls let me know.

[erohmensing]

Awesome @pnandhini11! I'll assign you to the issue. Let me know if you need any help :) Do you know how to open a PR against our repository in general?

[pnandhini11]

Hi @erohmensing , I made the necessary changes(in my local) to change the parser arguments to accept port from command line prompt for interactive learning. Can you tell me how to submit the code changes for your review?

[pnandhini11]

Awesome @pnandhini11! I'll assign you to the issue. Let me know if you need any help :) Do you know how to open a PR against our repository in general?

Hi @erohmensing , Can you help me to open PR against our repository?

[erohmensing]

Sure thing! Here is our tutorial for making code contributions, let me know if you have any specific questions regarding it: https://forum.rasa.com/t/how-to-make-a-code-contribution-to-rasa/11291