Add HTTP header via page rules

I’d like the ability to manage HTTP headers via page rules.

At the moment I’m specifically wanting to add link headers to trigger the server push speed optimisations ( however there are many other headers for security etc. That it would be convenient to manage via page rules

I’m aware that it’s possible to use service workers to alter add and remove headers, e. G. however I think the ability to do this via page rules would lower the barrier to entry and greatly encourage the use of performance features like push. It would be great if you could control link and security headers etc. via page rules.