Liam Kalita wraps up a series:
So far, we have seen how to create an app using ReactJS and and a Plumber API. In part 3, we will show you how to host the application on RStudio Connect (RSC)!
When it comes to hosting the application on RSC we will set the content URL for both the app and API so that they are in the same domain and won’t have this CORS issue.
Read the whole thing.