Facebook messenger : bot with nodejs full tutorial and conversation integrated

I have a problem with the realization of my bot and it has been a week and I could only do one bot with echo messages and a generic model. I would like to customize my robot more but all tutorials That I try to follow me display errors in heroku and the application does not work on facebook.I am developer Backend and front-end but I do not master well nodejs.I need help from everyone With a clear and explicit tutorial. I am in Ivory Coast and it is my passion to program but it has been 2 weeks that I drag on a bot project and that is not normal.There is the tutorial that I ' I tried to follow and that does not work for me. I really need a very explicit tutorialstrong text

Here is the link github that I tried to follow to program my robot:https://github.com/matthewericfisher/fb-robot

via Bamba Aboulatif