Suggestion: Use a backchannel in future tutorials

[rhiever]

Excellent tutorial today! Thank you for putting all of this together. I have one small suggestion.

I think it would've been helpful to have a backchannel to share code snippets, ask questions, etc. without disrupting the tutorial. I've seen the Mozilla Etherpad used quite successfully in tutorials like this before.

[amueller]

Thanks, we might do that in the future. You can also just flag me down.