refs https://github.com/TryGhost/Toolbox/issues/135
- To be able to reliably start ghost instance without a frontend the process needs access to urls/resources caches
- Storing the configuration in "paths" for now as there's no better place for it untill we are able to mock the content folder in pre-boot
closes: https://github.com/TryGhost/Ghost/issues/13739
- Ghost cannot write to the core folder in correctly configured production installations
- Built assets therefore need to be written to the content directory
- Ghost does not overwrite anything in the content folder as part of an upgrade, therefore static files that are provided by Ghost
must still live inside /core
- So as a result, we now have core/frontend/public and content/public
- this keeps production and test fixtures separate, so that changing the prod fixtures doesn't change the shape of our tests.
- we may still want to test that the production fixtures do what we expect, but that can be handled in a separate integration test, by specifically setting the fixture path