Comment by weitendorf

We do basically this for our tests in statue: https://github.com/accretional/statue/tree/main/test/hermeti...

npm pack builds the file locally, then we expose it to the container filesystem where we do a build and check the outputs. You can move dependencies to bundledDependencies in npm to embed them in the image.

However, this is assuming you're rebuilding the static site generator itself every time. If you just want to build a site using an existing static site generator, it's much easier provided that the site generator itself is easy to use (for example, ours has a one-liner to take you all the way from nothing to a local static site running on localhost, see https://statue.dev)

If you aren't changing the SSG code itself between container runs you'd just mount the markdown to the container and pre-install the ssg in the Dockerfile itself. For statue.dev that would just be a Dockerfile almost exactly the same as the one we use already, except you'd use your own script, and RUN this in the Dockerfile itself: yes | npx sv create . --template minimal --types ts --no-add-ons --install npm && npm install statue-ssg && npx statue init && npm install

In your script you'd just npm run build then do whatever it is you want to do to send the files somewhere, and wherever starts the script, you'd do something like -v "pathtomymarkdown/foo:/test-package/" - not sure how to do this in github runners.

Depending on how interested you/other people are in doing this with statue.dev, we could prob get something like this (where the markdown is parameterized, not the npm package) working by Tuesday. We're building out the sandbox/build features on our cloud platform as we speak, this could be one of the first use cases/defaults.