discourse/app/assets/javascripts/discourse-common/config/ember-cli-update.json

{
  "schemaVersion": "1.0.0",
  "packages": [
    {
      "name": "ember-cli",
      "version": "4.12.0",
      "blueprints": [
        {
          "name": "addon",
          "outputRepo": "https://github.com/ember-cli/ember-addon-output",
          "codemodsSource": "ember-addon-codemods-manifest@1",
          "isBaseBlueprint": true,
          "options": [
            "--no-welcome"
          ]
        }
      ]
    }
  ]
}