How to lead web projects with the first-year undergrads?

my alma mater sometimes invites me to lead student projects. Students are smart, they know C++, but not web (no js/css).

I'd like to give them a project in web. Something like checker game with a chat-in-game, and an option to choose a random player or play with a friend.

I would expect student will have about 3-4 months with about 10 hours a week for a project. It includes both reading manuals and implementing the project itself.

So there is a series of the question if you were I.

1. What stack would you use to learn web-development quickly and implement the project?
2. For the stack you suggest, can you supply with the materials you think are the best to study it?
3. Do you have any suggestions in general how to effectively lead students from the empty repository to a working website? Would you send students to study flask/django, or better some BaaS like Parse/Firebase? Would you make them to learn only JavaScript, or TypeScript as well?
4. What are your beloved short reads, like ah-ha moments in web development, you would send to your students?