Updated README file; upload figures

README.md

 ## CloudNEXT Portal Integration.
 Integration of Portal Frontend, Portal Backend and Shibboleth.
 
+----
+### Init submodules
+If `backend` and `frontend` folders are empty, do the following:
+```
+cd deploy
+git submodule update --init --recursive
+```
+
 ----
 ### Getting started
 Configure, start and check the logs of Portal.
@@ -255,4 +263,16 @@ curl "<APP_ADDRESS>/api/reservations/<RESERVATION_ID>/update_logs" \
 }' 
 ```
 
-These endpoints description, usage, and example can be found in the Documentation HTML Page or Insomnia Collection.
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+These endpoints description, usage, and example can be found in the Documentation HTML Page or Insomnia Collection.
+
+----
+### Architecture
+We have 2 figures describing the federated and non-federated environment.
+
+#### Federated
+In this environment we have the Shib Proxy to communicates to the CAFe Service. We also have the StackStorm service, that manage the infrastructure and communicates with Portal through Internet.
+![Federated Architecture](figures/federated.png?raw=true "Federated Architecture")
+
+#### Non-Federated
+In this environment, in the Portal Service, we have Frontend and Backend only. We also have the StackStorm service, that manage the infrastructure and communicates with Portal through Internet.
+![Non-Architecture](figures/non-federated.png?raw=true "Non-Federated Architecture")
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