GridDB via Kubernetes

I want to deploy application using Kubernetes, one of the used components will be a GridDb database, I used the following article to deploy it - https://griddb.net/en/blog/creating-a-kubernetes-application-using-griddb-and-go/ , the deployment manifest is shown below. One thing that I want to change is the securityContext, I'd like to avoid running as a root user. However, in documentation it says "we need to run as root user to have the sufficient permissions to save the changes to the config file". Any advise how I should proceed?

apiVersion: apps/v1
kind: Deployment
metadata:
  name: griddb-server-deployment
spec:
  replicas: 3 
  selector:
    matchLabels:
      app: griddb-server
  template:
    metadata:
      labels:
        app: griddb-server
    spec:
      volumes:
        - name: griddb-pv-storage
          persistentVolumeClaim:
            claimName: griddb-server-pvc
      topologySpreadConstraints:
        - maxSkew: 1
          topologyKey: kubernetes.io/hostname
          whenUnsatisfiable: DoNotSchedule
          labelSelector:
            matchLabels:
              app: griddb-server
      containers:
        - name: griddbcontainer
          image: localhost:5000/griddb-server:01
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 10001
          volumeMounts:
            - mountPath: "/var/lib/gridstore/data"
              name: griddb-pv-storage
          securityContext:
            runAsUser: 0
            runAsGroup: 0
          env:
          - name: NOTIFICATION_MEMBER
            value: '1'
          - name: GRIDDB_CLUSTER_NAME
            value: "myCluster"