Add ability to test crudspec using GraphQL serve

[wtrocki]

We need to document how to generate a schema that is compatible with the spec (using CLI tool) for people to understand it and interact with their types (no resolvers)

[craicoverflow]

graphql-serve requires you to have a local schema file configured with annotations etc and requires knowledge of Graphback.

What would be really cool is that graphql-serve could let you choose some in-memory example schemas if you don't want to use a local schema.

This would make trying out graphqlcrud even easier.

[wtrocki]

I believe it does that already when used as lib. Trick here is to really mention some of the examples that people can check and play with - spec on it's own is too bare. Sample tools list is good but for the time being we can mention graphql-serve