🎨 Use `env` as name for local env cache
🎨 Use `env` as name for local env cache

- NODE_ENV looks like an environment variable, and it may be thought that `config.get('NODE_ENV')` will contain the same value as `process.env.NODE_ENV`.
- By using the name `env` it's clear that this is our own env variable, meaning it is also clearer that this might be calculated from other properties or overidden, rather than being === NODE_ENV

TryGhost/Ignition