Fix ALB healthcheck template parsing errors with partial override configurations

[spbolton]

Description

Problem

Helm template rendering fails with nil pointer evaluation errors when using override values files that contain partial ALB configurations. The specific error occurs in ingress-dotcms-cluster.yaml when accessing nested healthcheck and targetGroup values that don't exist in merged configurations.

Error: template: dotcms/templates/ingress-dotcms-cluster.yaml:16:58: executing dotcms/templates/ingress-dotcms-cluster.yaml at <.Values.ingress.alb.healthcheck.backendProtocol>: nil pointer evaluating interface {}.backendProtocol

Root Cause

Override files contain partial ALB configurations (e.g., alb: {} or alb.hosts only) that replace the complete nested healthcheck/targetGroup structure from base values.yaml during Helm's values merging process.

Solution Implemented

Updated templates to use dig function for safe nested value access with proper defaults:

• dig ingress alb healthcheck backendProtocol HTTP .Values
• dig ingress alb targetGroup stickiness enabled true .Values

Benefits

✅ Backwards compatible with existing override files
✅ Graceful fallback to sensible defaults
✅ No template rendering errors
✅ Enhanced ALB health check configurations when available

Acceptance Criteria

• [Define what needs to be accomplished]

Additional Notes

[Any additional context or notes]