By installing Docker locally, we were able to code/test/run etc., our apps locally, building, running and linking pairs of small containers housing an app server and a database server. Alterations can be made to the models or the database tables, code can be edited, all locally. You can then "push" all the code from the app's root directory, to Bluemix in the Cloud (we have used the US South region as well as the Sydney, Australia region) with "cf push <app_name>", or "commit" and "push" to your upstream repo, and build & run it from there.
The cloud version, including API endpoints for each model should then be available on the Bluemix site from the browser, as long as you have configured your web certificates properly for the SSL system (https://). Of course you need to have connected a database service, with schema, and a full set of models for the app server to connect to. Adding database functions on the database server to post between 2 layers of the database (the Use Case layer receiving incoming Form-Data, and the Raw Business-Data Layer) and routing code in the node.js app server completes the backend.