improve docs

docs/config.md

@@ -165,14 +165,23 @@ want to [modify the container using attributes](attributes.md#modify-the-contain
 the passed namespaces will be compiled into blueprints, making sure all the required meta-data is there to create an
 instance of the class.
 
+This does require, however, to add a package to your dependencies.
+
+```sh
+composer require composer/class-map-generator
+``` 
+
+The following example demonstrates how to scan your project source files for annotations. The example compiles all 
+controllers, services and repository classes into a blueprints.
+
 ```php
 $builder = new ContainerBuilder();
 $config_classes = [
     new \MyApp\Config1,
     new \MyApp\Config2,
     new ContainerConfigClassScanner(
         [$rootDir . '/app/src'], // these directories should be scanned for classes and annotations
-        ['MyApp\\'], // classes inside these namespaces should be compiled
+        ['MyApp\\Controller\\', 'MyApp\\Service\\', 'MyApp\\Repository\\'], // classes inside these namespaces should be compiled
     )
 ];
 

docs/getting-started.md

@@ -68,6 +68,14 @@ maximum performance, we would have to compile the container, serialize it and sa
 Subsequent processes would only have to unserialize to have a compiled container. The `ContainerConfigClassScanner`
 scans for classes and annotations inside your project.
 
+This does require, however, to add a package to your dependencies.
+
+```sh
+composer require composer/class-map-generator
+``` 
+
+Creating a full-featured container could look as follows: 
+
 ```php
 use Aura\Di\ContainerBuilder;
 use Aura\Di\ContainerConfigClassScanner;