node_modules_gitignore.md

"Hey Alan..."

"I already commited my Node.js project, but I forgot to add node_modules to a gitignore. How fucked am I??"

It's cool, don't panic. First make your gitignore file:

$ touch .gitignore

Open it in Sublime Atom and add the line:

node_modules

Now to delete the folder from your existing git log, back in Terminal:

$ git rm -r --cached ./node_modules

Next time you do git add/commit, the node_modules folder is gone from git, but is still on your Mac.

Boom. You win.