Review Items in an ArcGIS Online Organization Group and choose to "promote" them to a production status. For example, this can mean sharing to another Group that is publicly available and part of an Open Data Site.
You will need the following things properly installed on your computer.
git clone <repository-url>this repository- change into the new directory
npm installbower install
ember server- Visit your app at http://localhost:4200.
Make use of the many generators for code, try ember help generate for more details
ember testember test --server
ember build(development)ember build --environment production(production)
Specify what it takes to deploy your app.