How to explicitly type my GraphQL schema?
How do I explicitly type my GraphQL schema? I have optional fields in some of my Content Definitions and if any of them are not being used at least once in the content my CMS users control, then the `gatsby develop` and `gatsby build` will both fail.
The error Gatsby gives me tells me to either create "dummy content" or to explicitly type my GraphQL schema (https://www.gatsbyjs.org/docs/schema-customization/#creating-type-definitions). I am not sure if the latter of the two options Gatsby gives me is actually doable on my end? Should I just create a dummy content to fix this error?