Update Apollo Server code snippet (#1969)

* Update Apollo Server code snippet

Resolves #1078

* Prettier

Author: bignimbus

src/code/language-support/javascript/server/apollo-server.md

@@ -17,17 +17,18 @@ Then run `node server.js` with this code in `server.js`:
 ```js
 import { ApolloServer } from "@apollo/server"
 import { startStandaloneServer } from "@apollo/server/standalone"
-import { buildSchema } from "graphql"
 
-const schema = buildSchema(`
-   type Query {
-      hello: String
-   }
-`)
+// The GraphQL schema
+const typeDefs = `#graphql
+  type Query {
+    hello: String
+  }
+`
 
+// A map of functions which return data for the schema.
 const resolvers = {
   Query: {
-    hello: () => "Hello World!",
+    hello: () => "world",
   },
 }
 
@@ -37,7 +38,6 @@ const server = new ApolloServer({
 })
 
 const { url } = await startStandaloneServer(server)
-
 console.log(`🚀 Server ready at ${url}`)
 ```