Continuous integration with github actions

As part of revamping website, switching to github actions from travis.

Reading this article, I thought I might revisit my attempt at a personal website.

This includes switching from blogdown to distill (mainly just for a change) and also trying github actions rather than travis (partly because I’ve been using Azure DevOps pipeline builds at work).

For now this is a work-in-progress, with this post part of the setup testing.