Toast NZ SilverStripe Installer
Make sure you are on the correct node version
sudo n 12
You will need to run
yarn in your site directory before the build tasks can run.
cd your/site/dir; yarn;
yarn run watch;
yarn run build;
Update the package.json, removing ^ from the dependency version numbers to lock them in the state they are in. This will avoid unwanted and breaking package updates in the future.