Setup CI/CD

[steelbrain]

I've broken jest at least a couple of times now, I am thinking it's time to setup CI. and while we're at it, we could also store the generated example's output, so people can just download that zip and run it directly, instead of having to know download/install Node.js etc.

[gozmanyoni]

Nice! wanted to add this for a while but never got to it - left some comments on the PR