ngx-bootstrap/schematics/collection.json

{
  "$schema": "../../node_modules/@angular-devkit/schematics/collection-schema.json",
  "schematics": {
    "ng-add": {
      "description": "Adds ngx-bootstrap to the application without affecting any templates",
      "factory": "./ng-add/index",
      "schema": "./ng-add/schema.json"
    }
  }
}