Before you can integrate Skillz into your HTML5 game, you must ensure that you have Apache Cordova installed on your local machine.
Apache Cordova is built on top of Node.js and NPM, so make sure those are installed beforehand. Refer to the instructions if you're unsure of their presence on your machine.
After Node.js and NPM are installed, open a terminal app and install Cordova using npm:
sudo npm install -g cordova
After this command, you should be able to run Cordova on the command line.
As of this writing, the Skillz Cordova SDK requires Cordova 8.0.0 or later. Please upgrade to ensure a smooth integration experience.