docs(server): add logger to readme

README.md

@@ -7,7 +7,7 @@ It is also meant to bundle as many server-side pubsweet dependencies as possible
 Install package and remove the dependencies it is meant to replace.
 
 ```sh
-yarn remove pubsweet pubsweet-server # if migrating from an existing project
+yarn remove pubsweet pubsweet-server @pubsweet/logger # if migrating from an existing project
 yarn add @coko/server
 ```
 
@@ -36,6 +36,14 @@ If you place this file in `server/app.js`, starting the server should work autom
 }
 ```
 
+### Logger
+
+To access the logger simply import like so:
+
+```js
+const { logger } = require('@coko/server')
+```
+
 ### Authorization middleware
 
 The server provides authorization checks through using `graphql-shield`.