remove node_modules folder

keeping your `require`d modules in the repository is a waste of space for people downloading / cloning it. npm is designed to manage your modules automatically, and you're doing a lot of work that it can do automatically for you.

I'd see https://docs.npmjs.com/getting-started/creating-node-modules and some of npm's other docs for help - basically you'll want to start out with `npm init` and a properly written package.json file.