Configures an experimental setup for a builderball-based public cache.
This cache only includes the two build machines (whitby & nevsky), for the time
period where both of them exist simultaneously.
The idea is this:
All participating hosts run a harmonia binary cache locally (whitby already
does). They then run builderball instances pointing at each other's harmonia
caches (through dedicated public hostnames).
When a request comes in, the first matching cache address is returned and Nix
will substitute from there.
Change-Id: Ia7d5357fd5e04f77b460205544fa24e82b100230
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12975
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
