Add missing security context template to promenade init container

This change adds security context template at container level
to implement readOnly-fs flag

Change-Id: Iab814a3dd5a9bc46251939d6335af6aab21e5eb5

charts/promenade/templates/deployment-api.yaml

@@ -52,6 +52,7 @@ spec:
       terminationGracePeriodSeconds: {{ .Values.pod.lifecycle.termination_grace_period.api.timeout | default "30" }}
       initContainers:
       - name: promenade-util
+{{ dict "envAll" $envAll "application" "promenade" "container" "promenade_util" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 8 }}
         command:
 {{- if $mounts_promenade_api.volumeMounts }}
           - "cp"

charts/promenade/values.yaml

@@ -179,6 +179,9 @@ pod:
       pod:
         runAsUser: 65534
       container:
+        promenade_util:
+          readOnlyRootFilesystem: true
+          allowPrivilegeEscalation: false
         promenade_api:
           readOnlyRootFilesystem: true
           allowPrivilegeEscalation: false