docs(guide/Running in Production): ng-strict-di

Adding note about Strict DI mode.

Closes #9908

Author: Kent C. Dodds

docs/content/guide/production.ngdoc

@@ -41,3 +41,35 @@ The page should reload and the debug information should now be available.
 
 For more see the docs pages on {@link ng.$compileProvider#debugInfoEnabled `$compileProvider`}
 and {@link angular.reloadWithDebugInfo `angular.reloadWithDebugInfo`}.
+
+## Strict DI Mode
+
+Using strict di mode in your production application will throw errors when a injectable
+function is not
+{@link di#dependency-annotation annotated explicitly}. Strict di mode is intended to help
+you make sure that your code will work when minified. However, it also will force you to
+make sure that your injectable functions are explicitly annotated which will improve
+angular's performance when injecting dependencies in your injectable functions because it
+doesn't have to dynamically discover a function's dependencies. It is recommended to
+automate the explicit annotation via a tool like
+[ng-annotate](https://github.com/olov/ng-annotate) when you deploy to production (and enable
+strict di mode)
+
+To enable strict di mode, you have two options:
+
+```html
+<div ng-app="myApp" ng-strict-di>
+  <!-- your app here -->
+</div>
+```
+
+or
+
+```js
+angular.bootstrap(document, ['myApp'], {
+  strictDi: true
+});
+```
+
+For more information, see the
+{@link di#using-strict-dependency-injection DI Guide}.