on-the-fly proxying

[jmandel]

Right now the server-proxy launches with a hard-coded underlying FHIR server URL. What if this was just a default, and the server-proxy also supported base URLs like:

https://server.subscriptions.argo.run/proxy-for/http%3A%2F%2Ftest.fhir.org%2Fr4

... and any queries with this prefix would dynamically route to http://test.fhir.org/r4 instead of the default. This would give folks a way to see how subscriptions might work on top of their own infrastructure of choice.

(I created a "crazy-idea" label to use for this :-))