You'll need to have the libraries below to be able to develop the application locally. You can install them manually, or using a package manager like Homebrew. We also have instructions for if you're using ASDF below.
Install asdf-vm.
Install the plugins and versions specified in .tool-versions
asdf plugin add ruby
asdf plugin add nodejs
asdf plugin add yarn
asdf install
When the versions are updated in main run asdf install
again to update your
installation.
(We don't mandate asdf, you can use other tools if you prefer.)