How to cache proxy requests?

[sholohov]

I needed to cache requests in a project, everything is fine with my own endpoints, problems start when caching is needed for proxied requests. Adding caching parameters to routeRules does not work, using proxyRequest in defineCachedEventHandler does not work either, I did not find any hints in the documentation. Has anyone encountered such a problem? Please share the solution.

[codeflorist]

There is an open issue regarding this including a workaround:
#957