root: implement db backups with monitored task, update docs

helm/templates/cronjob-backup.yaml

@@ -1,42 +0,0 @@
-{{- if .Values.backup }}
-apiVersion: batch/v1beta1
-kind: CronJob
-metadata:
-  name: {{ include "passbook.fullname" . }}-backup
-  labels:
-    app.kubernetes.io/name: {{ include "passbook.name" . }}
-    helm.sh/chart: {{ include "passbook.chart" . }}
-    app.kubernetes.io/instance: {{ .Release.Name }}
-    app.kubernetes.io/managed-by: {{ .Release.Service }}
-spec:
-  schedule: "0 0 * * *"
-  jobTemplate:
-    spec:
-      template:
-        spec:
-          restartPolicy: Never
-          containers:
-          - name: {{ .Chart.Name }}
-            image: "{{ .Values.image.name }}:{{ .Values.image.tag }}"
-            args: [server]
-            envFrom:
-              - configMapRef:
-                  name: {{ include "passbook.fullname" . }}-config
-                prefix: PASSBOOK_
-            env:
-              - name: PASSBOOK_SECRET_KEY
-                valueFrom:
-                  secretKeyRef:
-                    name: "{{ include "passbook.fullname" . }}-secret-key"
-                    key: "secret_key"
-              - name: PASSBOOK_REDIS__PASSWORD
-                valueFrom:
-                  secretKeyRef:
-                    name: "{{ .Release.Name }}-redis"
-                    key: "redis-password"
-              - name: PASSBOOK_POSTGRESQL__PASSWORD
-                valueFrom:
-                  secretKeyRef:
-                    name: "{{ .Release.Name }}-postgresql"
-                    key: "postgresql-password"
-{{- end}}