tools	www.preparetocode.io
design	http://www.dailyui.co/
js	https://github.com/myjinxin2015/Katas-list-of-Training-JS-series
js	https://www.javascript.com/
js	https://github.com/mrdavidlaing/javascript-koans
js	http://exercism.io/
jquery	http://try.jquery.com/
secu		https://www.root-me.org/?/lang=en
secu		https://www.hackerone.com/ (si tu resouds des bugs tu es payé)
secu		https://bountyfactory.io/en/index.html (payé pour resoudre des bugs)
script	https://codecombat.com/
script	https://screeps.com/
script	https://repl.it/repls/PuzzlingSugaryWrenchbird
script	http://gamejam.toxicode.fr/
script	http://www.toxicode.fr/learn
shell	https://explainshell.com/
shell	http://overthewire.org/wargames/bandit/bandit7.html
shell	https://cmdchallenge.com/
git	https://try.github.io/levels/1/challenges/1
git	https://learngitbranching.js.org/?demo
git https://github.com/jlord/git-it-electron
css	https://flukeout.github.io/
css	http://flexboxfroggy.com/#fr
css	http://www.flexboxdefense.com/
css	http://cssgridgarden.com/#fr

npm init
backpack-core
express
mongoose
volleyball
babel-preset-stage-3
dotenv