Readme of the demo not clear enough

[jenvigo]

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Is your feature request related to a problem? Please describe. I tried to run the demo locally following the readme steps but I failed so far. I am not an expert but I do work professionally as a developer so I think this can be explained a bit better.

Describe the solution you'd like I think there should be more screenshots or a more verbose description of the steps to run the demo locally. I think there should be a better description to edit the config.json file. The client_id can be found here but it took me hours to find out.