This image responsible for compiling site content and assets from
src/site_source with Sphinx and Jekyll and producing the final markup. It can also be used to temporarily serve a local preview of the content.
The image contains only the tooling and none of the content. Specifically, it expects the caller to mount volumes for:
/home/publisher/src-sphinx: source directory for Sphinx content
/home/publisher/src-jekyll: source directory for Jekyll content
/home/publisher/config: mount *.yml files in here to configure Jekyll
/home/publisher/_site: compiled site is written here
Convenient frontends for this image are