Change URL and var

Fixes #19

Author: Sashko Stubailo

docs/source/apollo-server/guide.md

@@ -238,16 +238,18 @@ import Resolvers from './data/resolvers';
 
 const GRAPHQL_PORT = 8080;
 
-var graphQLServer = express();
-graphQLServer.use('/', apolloServer({
+const graphQLServer = express();
+
+graphQLServer.use('/graphql', apolloServer({
   graphiql: true,
   pretty: true,
   schema: Schema,
   resolvers: Resolvers,
   //mocks: Mocks,
 }));
+
 graphQLServer.listen(GRAPHQL_PORT, () => console.log(
-  `GraphQL Server is now running on http://localhost:${GRAPHQL_PORT}`
+  `GraphQL Server is now running on http://localhost:${GRAPHQL_PORT}/graphql`
 ));
 ```