Re-enable cloudflare caching

[TymanWasTaken]

Cloudflare caching is currently disabled for reposilite endpoints because it was causing problems with the downloader code in https://github.com/Polyfrost/OneConfigLoader. I believe compression was enabled on responses, meaning it couldn't get the file size and thus never stopped waiting for the response to finish.

However, having caching disabled is eating up a lot of our 2TB upload limit from Hetzner, so caching should probably be enabled if possible