Make postgres initContainer images configurable via values.yaml

[hongaar]

This PR addresses the hardcoded postgres:15-alpine images used in initContainers across multiple Supabase services by making them configurable through values.yaml.

Problem

Previously, all initContainers across the Supabase Helm chart used a hardcoded postgres:15-alpine image, making it impossible to:

• Use different postgres versions for database connectivity testing
• Use custom postgres images with additional tools or configurations
• Control image pull policies for initContainers
• Use images from private registries

Solution

Added a new global initContainer configuration section to values.yaml that follows the same pattern used by other services in the chart:

initContainer:
  image:
    repository: postgres
    pullPolicy: IfNotPresent
    tag: "15-alpine"

Updated all deployment templates to reference this configurable value instead of the hardcoded image:

• charts/supabase/templates/analytics/deployment.yaml
• charts/supabase/templates/auth/deployment.yaml
• charts/supabase/templates/realtime/deployment.yaml
• charts/supabase/templates/storage/deployment.yaml
• charts/supabase/templates/test/db.yaml

Usage Example

Users can now customize the initContainer image in their values.yaml:

initContainer:
  image:
    repository: postgres
    pullPolicy: Always
    tag: "14"

Backward Compatibility

The change is fully backward compatible - the default values maintain the existing behavior (postgres:15-alpine with IfNotPresent pull policy).

Testing

• ✅ Helm lint passes
• ✅ Template generation works correctly
• ✅ Verified custom image configurations are applied correctly
• ✅ All initContainers now use the configured image values

---

🤖 This PR was generated by Copilot

[Copilot]

Pull Request Overview

This PR makes postgres initContainer images configurable across Supabase services by introducing a global initContainer configuration section in values.yaml, replacing hardcoded postgres:15-alpine references.

• Adds global initContainer.image configuration with repository, pullPolicy, and tag settings
• Updates all deployment templates to use the configurable image values instead of hardcoded strings
• Maintains backward compatibility with existing default values

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
charts/supabase/values.yaml	Adds global initContainer image configuration section
charts/supabase/templates/analytics/deployment.yaml	Updates initContainer to use configurable image values
charts/supabase/templates/auth/deployment.yaml	Updates initContainer to use configurable image values
charts/supabase/templates/realtime/deployment.yaml	Updates initContainer to use configurable image values
charts/supabase/templates/storage/deployment.yaml	Updates initContainer to use configurable image values
charts/supabase/templates/test/db.yaml	Updates test container to use configurable image values

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}