Two versions of the PreTeXt-Docker image are available: base and full. The base image is smaller and contains only the essential tools needed to build PreTeXt documents. The full image includes additional tools and libraries for more advanced features. These are published on Docker Hub at https://hub.docker.com/r/pretextbook/pretext as pretext/pretext and pretextbook/pretext-full. You can specify a version tag for either image, such as pretextbook/pretext-full:1.12, or use pretextbook/pretext-full:latest to get the most recent version.
In the base image, all the software to build basic PreTeXt documents, including python, nodejs, prefigure, and of course the PreTeXt-CLI is included. You also get a small LaTeX installation, which should be enough to build most PDF outputs and use tikz images as in a <latex-image> element.
The full image adds asymptote and sagemath in case you want to use these programs to generate images.