Install NodeJs for your platform https://nodejs.org/en/download/package-manager/ then
$ sudo npm install -g ionic cordova && npm install
for live view in browser
$ ionic serve
for IOS build
$ ionic cordova platform add ios
$ ionic cordova build ios
for Android build
$ ionic cordova platform add android
$ ionic cordova build android
Substitute ios for android if not on a Mac.
- for runnning on IOS read 'iOS Devices' on https://ionicframework.com/docs/intro/deploying/ you must have Xcode, and developer certificate
- for running on Android install apk from platforms/android/build/outputs/apk