Updating .gitignore

You committed a file or files to git and pushed it up to GitHub. Not you. But yes, you. Let's fix that.

1. Start by updating your .gitignore file and put the file or directory you want to ignore.

## You don't need to commit this!!!
node_modules

2. Commit the newly updated .gitignore file.

git add .
git commit -m ".gitignore updated"

3. Next, you want to remove all files uploaded that should of been ignored. To remove the cache in your repository run this command:

git rm -r --cached .

4. Commit the changes to your that now has removed all files and directories in your .gitignore and push them to the repository.

git add .
git commit -m "files removed from .gitignore"

There you go. Just remember to put those file and directory names in .gitignore next time. You won't forget, I'm sure.