This is by far my favorite resource for learning Express and NodeJS:
The guy breaks down and explains every line of code so that you have a better understanding of what it’s doing.
He also has a Part 2 that incorporates MongoDB: http://cwbuecheler.com/web/tutorials/2014/restful-web-app-node-express-mongodb/
Trello Board of Resources for learning Front-End and Git. I mainly look at the boards under React:
A great and easy way to develop responsive sites:
A great way to learn JS by playing a game: https://codecombat.com
Free Code Camp has a clan you can join: https://codecombat.com/clans/5835e3b200a02f2400786712