Support other artefacts instead of only docker artefacts

[pareion]

What is the problem you're trying to solve
We're currently using Azure Container Registry, but all our external HelmCharts and Dockerfiles are either uploaded through a pipeline or manually. Having them all as cache rules would be nice, so we didn't require any pipelines or manual intervention.

Describe the solution you'd like
A clear and concise description of what you want to happen.

Support adding all of our external URLs to the Cache Rule on Azure Container Registries. Right now we can't add all of them because some are either not supported or the artefacts we fetch are not docker artefacts.

A list of registries we use:

• https://azure.github.io/
• https://traefik.github.io/
• https://helm.elastic.co/
• https://open-policy-agent.github.io/
• https://prometheus-community.github.io/
• https://azure.github.io/gitops-connector
• https://charts.jetstack.io/
• https://open-telemetry.github.io/
• https://stakater.github.io/

Would love to be able to use these as external providers for the cache rules.

Describe alternatives you've considered
We have an alternative, but the alternative is doing it manually or through the pipelines in Azure DevOps.

[JXavierMSFT]

Hey @pareion

Thank you for making this request. We are actively looking into adding more upstreams to Artifact Cache. I've recorded the upstreams you listed above for our further improvements. I'll update this thread when we begin to roll these out.