To correctly clone the repository, use the --recurse-submodules tag, i.e.
git clone --recurse-submodules git@github.com:alessandro-marcantoni/mas-web-ide.git
or, with HTTP,
git clone --recurse-submodules https://github.com/alessandro-marcantoni/mas-web-ide.git
Once cloned the repository, go to the root of the project and run the docker-compose:
cd mas-web-ide
docker compose up