Add Support for umami Analytics

[mesudip]

List of changes

• Remove Google Tag manager
• Add Umami analytics. (dynamically injected only when running on production)

Design Decisions

• Umami script was injected dynamically in the the index.html, preventing initialization during dev build
• Nginx config is dynamically generated by entrypoint at runtime.
• Umami traffic is directed via nginx container, that serves the frontend. This prevents cross origin requests from the frontend.
• There are no regressions in the product features.

Checklist

• My changes generate no new warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the changelog
• I have added tests that prove my fix is effective or that my feature works

[kusssal]

Looks Good