Hi, we're interested in using the project with our self hosted runner setup.

But the docs are kinda confusing?

"The cache server is available as a Docker image and can be deployed via Docker Compose or Kubernetes."

Docker Compose is usually used for local development, and writing "kubernetes" doesn't really help :D

You seem to be maintaining a helm chart here:

https://github.com/falcondev-oss/github-actions-cache-server/tree/dev/install/kubernetes/github-actions-cache-server

But there are no installation instructions? What is the repository url?

Typically is would expect to find something like:
https://github.com/HenrikDK/helm-charts