I'm looking for a solution to share docker cache across multiple CI instances
The main use case is when building a new image using instance A, then building the same image using instance B from scratch, instead of having shard docker cache
This causes longer build / push time, and it can be shortened by sharing the cache
What I thought about is using
docker save to .tar file, and
docker load from the .tar file - each and every build new .tar file is created and shared between all the instance
Is there a more common solution for that problem?