How do you build the documentation? I can see files in the docs dir turn into <a href="http:&#x2F;&#x2F;www.chartjs.org&#x2F;docs&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.chartjs.org&#x2F;docs&#x2F;</a>. But I couldn&#x27;t find any npm plugin etc.