Thanks Evgeny -- 
We tried to go down that route. We couldn't deploy the front-end as a CSP application. Worthwhile to just package the REST API for deployment? I suppose so -- because just the APIs are useful for testing via Postman or other tool

Congrats to all! I learned a lot (and am still learning) from these great topics

Very helpful. I didn't know there was an XSL wizard in Studio.