Install development libraries
sudo apt install \
build-essential \
libvulkan-dev \
vulkan-validationLayers-dev
From the richard subdirectory, to make a release build, run
cmake -B build/release -D CMAKE_BUILD_TYPE=Release
cmake --build build/release
And for a debug build:
cmake -B build/debug -D CMAKE_BUILD_TYPE=Debug
cmake --build build/debug