https://teamtreehouse.com/library/introduction-to-graphql
To run the GraphQL examples provided in this repo, start with installing all of the required dependencies by running the following command:
npm install
The examples are organized by course stage and video. For example, to run the example for the 5th video in the 1st stage of the course, run the following command:
node s1v5.js
Then browse to http://localhost:3000/, enter your GraphQL query in the left pane, press the "Play" button (in the middle of the screen), and view your results in the right pane.
If you click on the green tab that's pinned to the right edge of the screen, you can view the details for the available GraphQL schema.
Note: To run another example, press CTRL+C to stop the server. Then use the node command to run your next example.
For more information about Apollo Server, see the official documentation at https://www.apollographql.com/docs/apollo-server/.