Can't build locally without Docker

It would be convenient to be able to build this project without needing to run the Dockerfile. It's an obstacle to development to have to run inside a proprietary system and to not be able to directly interact with the sources, assets, and builds.

E.g. a Makefile for the build which is then run inside Docker would be usable from the outside and inside of the container. Dockerfile is convenient for normalizing builds and enumerating the dependencies, but it's even more helpful to be able to look at that list of build dependencies, make sure they're available on my local system, and then directly build the project without Docker. It's also likely significantly more efficient to do that.

Start by reading the Dockerfile to inventory the dependencies and build steps it currently provides. Compare those steps with the project’s source and asset layout, then determine whether a Makefile can expose the same build locally and inside Docker. Done means the project builds successfully without running Docker and the existing container build remains usable.