Based on Josh Morony's Build a Todo App from Scratch with Ionic 2 & 3
https://www.joshmorony.com/build-a-todo-app-from-scratch-with-ionic-2-video-tutorial/
This is updated version cause I couldn't find updated github repository for this ionic to-do crud app
The guide notes that the last update is July 6, 2017
You can just clone the repo, cd into it and do the npm install
then a simple ionic serve will do