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Define a GraphQL schema

mkdir graphql
touch graphql/index.graphql

Now, edit graphql/index.graphql using your preferred editor. In this journey, we are going to add

  1. 🕰  A get datetime query, and
  2. 🏓  A ping-pong mutation
graphql/index.graphql
schema {
  query: Query
  mutation: Mutation
}

type Query {
  getDateTime: String!
}

type Mutation {
  pong(word: String!): String!
}