README onboarding-sdk

[manuraf]

List of Changes

Added REAME to onboarding parent
Added REAME to onboarding sdk

Motivation and Context

Update documentation about onboarding-sdk

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[gunzip]

when do we have such a need?

[manuraf]

Selfcare Products is a collection of PagoPA products available for use by institutions. Each product contains specific information, such as its status, admitted role, or a filepath template for building contract necessary for selfcare business logic.

Currently, these product records are stored in a MongoDB collection which are accessible through a REST API.
We are planning to replace this architecture with a file-based approach in our roadmap. This change is driven by the fact that all product information requires only 36KB of storage so we will saving in terms of resource and maintenance.

The Onboarding SDK Product offers a set of classes designed for managing this collection of records using a file.