Proposal: Invocation image OCI runtime requirements extension

[jlegrone]

For OCI-based invocation images, there are cases in which invocation image authors may need to express certain runtime requirements such as memory quota or the ability to mount a docker socket.

A well-known custom extension for defining these requirements would ideally

1. Support scoping requirements to an invocation image, not the bundle (multiple invocation images can be present in the same bundle, and may have different requirements)
   • Do invocation images need an embedded custom map?
2. Allow for future extensibility as new use cases are defined
3. Be generic enough to be used by multiple bundle builders, CLIs, and execution runtimes

[technosophos]

I agree -- I think this is going to be increasingly important for not just cloud cases, but for constrained providers (edge, IoT) as well.