docs: added Prerequisites and GH Credentials to README (#498)

README.md

@@ -2,6 +2,11 @@
 
 Microservice responsible for orchestrating the functionalities required for user dashboard activities. It retrieves institutions for a specific user by identifying their roles and permissions. It manages delegations related to an institution and technology partner and allows access to individual product back-office.
 
+## Prerequisites
+
+    Java version: 17
+    Maven version: 3.9.*
+
 ## Required Configuration Properties
 
 Before running you must set these properties as environment variables.
@@ -15,6 +20,26 @@ Before running you must set these properties as environment variables.
 | backoffice.pago-pa.subscriptionKey<br/>                  | BACKOFFICE_PAGO_PA_API_KEY               |             |     yes      |
 | jwt.signingKey<br/> <br/>                                | JWT_TOKEN_PUBLIC_KEY                     |             |     yes      |
 
+## Setup 
+
+### GitHub Credentials for selfcare-onboarding-sdk
+
+To use the selfcare-onboarding-sdk, you need to configure your Maven settings to include GitHub credentials. This allows Maven to authenticate and download the required dependencies.
+
+1. Open or create the ~/.m2/settings.xml file on your local machine.
+2. Add the following <server> configuration to the <servers> section:
+
+```xml script
+<servers>
+    <server>
+        <id>selfcare-onboarding</id>
+        <username>**github_username**</username>
+        <password>**ghp_token**</password>
+    </server>
+</servers>
+
+```
+
 ## Running the application
 
 You can run your application using: