README.md in rack-graphql-2.0.0 vs README.md in rack-graphql-2.1.0

@@ -21,14 +21,15 @@
 
 Add following to your `config.ru` file:
 
 ```ruby
 run RackGraphql::Application.call(
-  schema: YourGraqphqlSchema,                 # required
-  app_name: 'your-service-name',              # optional, used for health endpoint content
-  context_handler: YourGraphqlContextHandler, # optional, empty `proc` by default
-  health_route: true,                         # optional, true by default
-  logger: A9n.logger,                         # optional, not set by default
+  schema: YourGraqphqlSchema,                    # required
+  app_name: 'your-service-name',                 # optional, used for health endpoint content
+  context_handler: YourGraphqlContextHandler,    # optional, empty `proc` by default
+  log_exception_backtrace: !A9n.env.production?, # optional, `true` default
+  health_route: true,                             # optional, true by default
+  logger: A9n.logger,                            # optional, not set by default
 )
 ```
 
 `context_handler` can be a class, object or proc. It must respond to `call` method taking `env` as an argument. It is supposed to decode or transform request properties to graphql context (eg. jwt token to user object, as shown on an example below).