CLI version of trianglify

First, thank you for creating this project!

Just wanted to drop a note that I've created a CLI version of trianglify with a few options exposed to tweak the images: https://github.com/furlai/trianglifier

It's not much, just a small typescript-based node application that configures things within Docker. However, I figure for folks just wanting to quickly generate and iterate on an image without embedding the library on a site, it serves a decent purpose.

Feedback welcome, of course.