GraphQL is an alternative to REST, created by Facebook (http://graphql.org/). This technology allows a server to implement and publish a schema and the clients then can ask for the information they need rather than understanding and making use of various API endpoints.
For this recipe, we'll create a Graphql schema that represents a deck of playing cards. We'll expose one resource card, which can be filtered by suit and value. Alternatively, it can return all the cards in the deck if no arguments are specified.
