What motivated us this year was the requested solution. Usually we expect an application but here we were surprised by the word "Tutorial". Indeed, many developers know how to build applications but few know how to write a tutorial. So we participate in this exercise to test our ability to explain at a high level our little experiment on heroku. That's why we chose to build bot messenger because until now it's always difficult for some people on heroku to create one.
This exercise taught us how to make a tutorial in good uniform, how to hold the reader.
The difficulty encountered was how to make a conise translation of explanations collected on heroku in English. We also had to find how to make our tutorial pleasant and we opted for emoticons. Find something innovative in Bot Messenger. To be able to apply it ourselves!