Feat: Add init containers options to helm chart

.changesets/feat_add_helm_init_containers.md

@@ -0,0 +1,5 @@
+### Helm: add init containers to deployemt ([Issue #3248](https://github.com/apollographql/router/issues/3248))
+
+This is a new option when starting the router, so that before starting another container runs and performs necessary tasks.
+
+By [@laszlorostas](https://github.com/laszlorostas) in https://github.com/apollographql/router/pull/3444

helm/chart/router/templates/deployment.yaml

@@ -129,6 +129,10 @@ spec:
         {{- if .Values.extraContainers }}
           {{- include "common.tplvalues.render" (dict "value" .Values.extraContainers "context" $) | nindent 8 }}
         {{- end }}
+      {{- if .Values.initContainers }}
+      initContainers:
+        {{- include "common.tplvalues.render" (dict "value" .Values.initContainers "context" $) | nindent 8 }}
+      {{- end }}
       {{- if or .Values.router.configuration .Values.extraVolumes }}
       volumes:
         {{- if .Values.router.configuration }}

helm/chart/router/values.yaml

@@ -86,6 +86,14 @@ containerPorts:
 #       - containerPort: 4001
 extraContainers: []
 
+# -- An array of init containers to include in the router pod
+# Example:
+# initContainers:
+#   - name: init-myservice
+#     image: busybox:1.28
+#     command: ["sh"]
+initContainers: []
+
 # -- A map of extra labels to apply to the router deploment and containers
 # Example:
 # extraLabels: