updated README

README.md

@@ -2,17 +2,37 @@
 
 This is the code companion for a series of tutorials designed for developers new to the **SPA Editor** feature in Adobe Experience Manager (AEM). There are two parallel versions of the tutorial:
 
-* [Create your first React SPA in AEM](https://docs.adobe.com/content/help/en/experience-manager-learn/tutorials/develop-spa-react/overview.html)
 * [Create your first Angular SPA in AEM](https://docs-stg.corp.adobe.com/content/help/en/experience-manager-learn/tutorials/develop-spa-angular/overview.html)
+* [Create your first React SPA in AEM](https://docs.adobe.com/content/help/en/experience-manager-learn/tutorials/develop-spa-react/overview.html)
+
+The starter and solution branches in this repository correspond to **Angular** and **React** versions of the tutorial.
+
+## Modules
+
+The main parts of the project are:
+
+* **core**: Java bundle containing all core functionality like OSGi services, listeners or schedulers, as well as component-related Java code such as servlets or request filters.
+* **ui.apps**: contains the /apps (and /etc) parts of the project, ie JS&CSS clientlibs, components, templates and runmode specific configs
+* **ui.content**: contains sample content using the components from the ui.apps
+* **ui.tests**: Java bundle containing JUnit tests that are executed server-side. This bundle is not to be deployed onto production.
+* **ui.frontend**: an optional dedicated front-end build mechanism. Depending on the branch this will be either the **React** or **Angular** source code.
+
+## How to build
+
+To build all the modules run in the project root directory the following command with Maven 3:
+
+    mvn clean install
+
+If you have a running AEM instance you can build and package the whole project and deploy into AEM with
+
+    mvn clean install -PautoInstallSinglePackage
+
+Or to deploy it to a publish instance, run
+
+    mvn clean install -PautoInstallSinglePackagePublish
 
-The starter and solution branches in this repository correspond to **React** and **Angular** versions of the tutorial.
+### Building for AEM 6.x.x
 
-## React Branches
+The project has been designed for **AEM as a Cloud Service**. The project is also backward compatible with AEM **6.4.8** by adding the `classic` profile when executing a build, i.e:
 
-* **Create a Project**
-  * [Tutorial](https://docs.adobe.com/content/help/en/experience-manager-learn/tutorials/develop-spa-react/create-project.html)
-  * [Solution](https://github.com/adobe/aem-guides-wknd-spa/tree/React/create-project-solution)
-* **Integrate the SPA**
-  * [Tutorial](https://docs.adobe.com/content/help/en/experience-manager-learn/tutorials/develop-spa-react/integrate-spa.html)
-  * [Start](https://github.com/adobe/aem-guides-wknd-spa/tree/React/integrate-spa-start)
-  * [Solution](https://github.com/adobe/aem-guides-wknd-spa/tree/React/integrate-spa-solution)
+    mvn clean install -PautoInstallSinglePackage -Pclassic