The Dockerfile and docker-compose.yml file contain all the stuff to boot up a container for the website. A docker compose up should be enough to access the website. You can also spin up the website outside of the container, more details below.
The Makefile has all the build commands. You can run make all_<os> to run all the commands. Make sure you have all the appropriate programs installed. You can access the main page at localhost:8080/index.html.
The last link in the section below has more info at the bottom of the readme on how to build this project. In short, it uses tools.build to make an uberjar. Also, if you’re on windows, you can install make via chocolatey.
For more info about how this repo is built on fulcro check out the fulcro docs, here, and/or here.