Replace bitnami Helm chart dependencies with upstream alternatives

[Copilot]

Bitnami dependencies are deprecated. This PR replaces all three bitnami chart dependencies with stable alternatives using custom templates and official upstream images.

Changes

PostgreSQL

• Already replaced with CloudNativePG operator in custom template

Keycloak

• Created keycloak-service.yaml for service definition
• Fixed configmap.yaml to use .AsConfig directly without nested key
• Fixed keycloak-deployment.yaml:
  • PostgreSQL sidecar now uses TCP probes instead of HTTP
  • Changed port protocol from UDP to TCP
  • Added conditional for optional extraEnvVars
• Updated ingress.yaml to reference {{ include "api-platform.fullname" . }}-keycloak instead of bitnami helper template

external-dns

• Created external-dns-deployment.yaml with:
  • Deployment using registry.k8s.io/external-dns/external-dns:v0.15.0
  • Full RBAC (ServiceAccount, ClusterRole, ClusterRoleBinding)
  • Cloudflare API token secret support
• Removed dependency from Chart.yaml
• Updated values.yaml with official image repository

Template Structure

The keycloak realm ConfigMap was incorrectly nesting data:

# Before (invalid)
data:
  realm.json: |
    {{ (.Files.Glob .Values.keycloak.importRealm.path).AsConfig | indent 2 }}
    # This created: realm.json: realm-demo.json: { ... }

# After (valid)
data:
{{ (.Files.Glob .Values.keycloak.importRealm.path).AsConfig | indent 2 }}
# This creates: realm-demo.json: |

Chart now passes helm lint and renders successfully.

---

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• artifacthub.io
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• kubernetes-sigs.github.io
  • Triggering command: /usr/local/bin/helm helm dependency update (dns block)
  • Triggering command: /usr/local/bin/helm helm repo add external-dns REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)