added a note about services locators

Author: HeahDude

service_container.rst

@@ -896,6 +896,11 @@ But, if you *do* need to make a service public, override the ``public`` setting:
             ;
         };
 
+.. note::
+
+    Instead of injecting the container you should consider using a
+    :ref:`service locator <service-locators>` instead.
+
 .. _service-psr4-loader:
 
 Importing Many Services at once with resource

service_container/service_subscribers_locators.rst

@@ -1,6 +1,8 @@
 .. index::
     single: DependencyInjection; Service Subscribers
 
+.. _service-locators:
+
 Service Subscribers & Locators
 ==============================