Adding diagnostics to nginx.conf

[ppathan]

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:

• All new and existing tests passed.
• The code follows the code style and conventions of this project.
• The change requires a change to the documentation.
• I have updated the documentation accordingly.

Description of the change

Adding diagnostics endpoint to the nginx.conf that allows the basic deployment to pass through to diagnostics microservice

Motivation for the change

• Allowing to collect usage data for RMv2