Merge pull request #187 from Netflix/spring-graphql-docs

Update context contributor docs.

docs/advanced/graphqlcontext-leveraging.md

@@ -5,6 +5,8 @@ is now the approved context mechanism (replacing the previously used opaque Cont
 via key/value pairs to provide frameworks and userspace code the capability to contribute, share and leverage various 
 pieces of context independent of each other.
 
+Note that if you simply require interception/modification of request and response headers, you can use a `WebGraphQlInterceptor` provided by Spring GraphQL as described [here](intercepting-http-request-response.md).
+
 To make this easily leverageable by DGS customers, a new interface has been provided for which any Spring Beans registered 
 that implement the [`GraphQLContextContributor`](https://github.com/Netflix/dgs-framework/blob/master/graphql-dgs/src/main/kotlin/com/netflix/graphql/dgs/context/GraphQLContextContributor.kt) 
 interface, their `contribute` method will be invoked before any normal instrumentation classes are invoked, allowing 

docs/advanced/intercepting-http-request-response.md

@@ -1,7 +1,7 @@
-# Response Instrumentation
-The DGS framework internally uses [GraphQL Java] and [Spring for GraphQL].
+# Request and Response Header Instrumentation
+The DGS framework internally uses `GraphQL Java` and `Spring for GraphQL`.
 
-If you need to modify the HTTP request and response headers, you can leverage the `WebGraphQlInterceptor` in [Spring for GraphQL] (https://docs.spring.io/spring-graphql/reference/transports.html#server.interception) to accomplish this.
+If you need to modify the HTTP request and response headers, you can leverage the `WebGraphQlInterceptor` in [Spring for GraphQL](https://docs.spring.io/spring-graphql/reference/transports.html#server.interception) to accomplish this.
 This provides a hook to update the request and response headers based using the `GraphQLContext`
 
 #### Example: