The key stuff is from this project (not mine) https://github.com/ryansb/hugo-lambda

I couldn't get to CloudFormation template deploy working, so set it all up by hand, using the scripts in that repo as a base.

Once you figure out how it works, it becomes easy to start adding other commends to run (for example, I added some lines to invalidate CloudFront when I uploaded a blog post).

If I get a change over the next week or so I'll update a repo with the scripts I use, but as I said it's based on the above anyway.