Add Gatsby docs config (sidebar link, etc.) for full-query caching from

#2437. (#2637)

Add Gatsby docs config (sidebar link, etc.) for full-query caching from #2437.

CHANGELOG.md

@@ -6,7 +6,7 @@
 - Add cache-control: no-cache header to both PersistedQueryNotSupportedError and PersistedQueryNotFoundError responses as these should never be cached. [PR #2452](https://github.com/apollographql/apollo-server/pull/2452)
 - `apollo-datasource-rest`: Don't attempt to parse "204 No Content" responses as JSON. [PR #2446](https://github.com/apollographql/apollo-server/pull/2446)
 - `apollo-server-express`: Fix Playground URL when Apollo Server is mounted inside of another Express app by utilizing `req.originalUrl`. [PR #2451](https://github.com/apollographql/apollo-server/pull/2451)
-- New plugin package `apollo-server-plugin-response-cache` implementing a full query response cache based on `apollo-cache-control` hints. The implementation added a few hooks and context fields; see the PR for details. There is a slight change to `cacheControl` object: previously, `cacheControl.stripFormattedExtensions` defaulted to false if you did not provide a `cacheControl` option object, but defaulted to true if you provided (eg) `cacheControl: {defaultMaxAge: 10}`. Now `stripFormattedExtensions` defaults to false unless explicitly provided as `true`, or if you use the legacy boolean `cacheControl: true`. [PR #2437](https://github.com/apollographql/apollo-server/pull/2437)
+- New plugin package `apollo-server-plugin-response-cache` implementing a full query response cache based on `apollo-cache-control` hints. The implementation added a few hooks and context fields; see the PR for details. There is a slight change to `cacheControl` object: previously, `cacheControl.stripFormattedExtensions` defaulted to false if you did not provide a `cacheControl` option object, but defaulted to true if you provided (eg) `cacheControl: {defaultMaxAge: 10}`. Now `stripFormattedExtensions` defaults to false unless explicitly provided as `true`, or if you use the legacy boolean `cacheControl: true`. For more information, [read the documentation](https://www.apollographql.com/docs/apollo-server/features/caching).  [PR #2437](https://github.com/apollographql/apollo-server/pull/2437)
 - Allow `GraphQLRequestListener` callbacks in plugins to depend on `this`. [PR #2470](https://github.com/apollographql/apollo-server/pull/2470)
 - Add `rewriteError` option to `EngineReportingOptions` (i.e. the `engine` property of the `ApolloServer` constructor).  When defined as a `function`, it will receive an `err` property as its first argument which can be used to manipulate (e.g. redaction) an error prior to sending it to Apollo Engine by modifying, e.g., its `message` property.  The error can also be suppressed from reporting entirely by returning an explicit `null` value.  For more information, [read the documentation](https://www.apollographql.com/docs/apollo-server/features/errors#for-apollo-engine-reporting) and the [`EngineReportingOptions` API reference](https://www.apollographql.com/docs/apollo-server/api/apollo-server#enginereportingoptions). [PR #1639](https://github.com/apollographql/apollo-server/pull/1639)
 - `apollo-server-testing`: Add `variables` and `operationName` to `Query` and `Mutation` types. [PR #2307](https://github.com/apollographql/apollo-server/pull/2307) [Issue #2172](https://github.com/apollographql/apollo-server/issue/2172)

docs/gatsby-config.js

@@ -28,6 +28,7 @@ module.exports = {
             'essentials/data',
           ],
           Features: [
+            'features/caching',
             'features/mocking',
             'features/errors',
             'features/data-sources',