Are maps supported for yaml? I'm getting error

* unexpected configuration type 'map[string]interface {}': valid types are string, List<string>, number, List<number>, integer, List<integer>, boolean, List<number>

for

config:
  cloud_run:resources:
    ingress: "all"

Nope, hit this same issue a few days ago

Not today, but you can use fn::fromjson to decode a JSON string into a map.