Example json:
{ "version": "3", "services": { "web": { "build": "web" }, "redis": { "image": "redis" }, "datadog": { "build": "datadog" }, "another": { "image": "mysql" } } }
I'd like to return a list of services that have the "build" key, and not the "image" key. Note that the value for the build key isn't something I can key off of.
Output should be: ["web", "datadog"]
#json