Use statefulset and persistent storage

chart/templates/statefulset.yaml

@@ -1,5 +1,5 @@
 apiVersion: apps/v1
-kind: Deployment
+kind: StatefulSet
 metadata:
   name: {{ include "maptest-bot.fullname" . }}
   labels:
@@ -11,6 +11,15 @@ spec:
   selector:
     matchLabels:
       {{- include "maptest-bot.selectorLabels" . | nindent 6 }}
+  serviceName: {{ include "maptest-bot.fullname" . }}
+  volumeClaimTemplates:
+  - metadata:
+      name: map-submits
+    spec:
+      accessModes: [ "ReadWriteOnce" ]
+      resources:
+        requests:
+          storage: 1Gi
   template:
     metadata:
       {{- with .Values.podAnnotations }}
@@ -40,6 +49,8 @@ spec:
             - name: config
               mountPath: "/app/config"
               readOnly: true
+            - name: map-submits
+              mountPath: "/app/files"
       initContainers:
         - name: {{ .Chart.Name }}-init
           securityContext: