From Metro Studios Knowledgebase
Visit https://nodejs.org/en/download/ and click the windows installer (currently a dark green windows icon on a light-green background).
Run the installer at the root level of the C: drive. The file path should be C:/Node
Verify Node is installed by opening git bash and running this command: node -v If node is installed, the console will log a version number
Open git bash at the root level on the C: drive
Run this command: npm intall -g gulp
Verify gulp is installed by running this command: npm list -g gulp
 Gulp Tasks
Use git bash to run gulp tasks from the project directory.
Compiles project's stylus files to minified CSS
-- Automatically watches project's stylus files for changes and compiles on save.
-- Repaints CSS in browser without a page refresh (only works in Chrome with LiveReload extension)
ex. myScript.js -> myScript.min.js