helm: upgrade nginx version and refactor configuration files tosupport nginx extensions( MAPCO-10120)

[almog8k]

This pull request restructures the NGINX configuration for the Raster Helm chart to improve modularity and maintainability. The changes update the NGINX dependency, split the monolithic configuration files into smaller, more focused files, and update the Helm values and templates to support these new configuration patterns. Additionally, it introduces support for Prometheus metrics, OpenTelemetry, and modernizes the NGINX image and dependency versions.

NGINX Configuration Refactor:

• Removed the large, monolithic default.conf and nginx.conf files, splitting their contents into two new files: pycsw-location.conf for location-specific settings and pycsw-server.conf for server-level settings. [1] [2] [3] [4]
• Updated the NGINX ConfigMap template to reference the new configuration files instead of the old ones.
• Adjusted the extra volume mounts in values.yaml to mount the new config files at the appropriate locations in the container.

Dependency and Image Updates:

• Upgraded the NGINX Helm dependency from version 1.1.0 to 2.1.6 and changed the repository path, aligning with the new image (common/nginx:v2.1.6). [1] [2]

Feature Enhancements:

• Added support for Prometheus metrics exporter and OpenTelemetry tracing, with corresponding configuration options in values.yaml.
• Expanded backend and ingress configuration options, including customizable ingress mapping and TLS settings.

These changes collectively modernize the NGINX setup, improve configuration management, and add observability features.

[github-actions]

🎫 Related Jira Issue: MAPCO-10120