Kubernetes manifest using configmap reload container

k8s.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    test-app: test
  name: test
  namespace: default
spec:
  externalTrafficPolicy: Cluster
  ports:
  - nodePort: 30321
    port: 3000
    protocol: TCP
    targetPort: 3000
  selector:
    test-app: test
  sessionAffinity: None
  type: NodePort
status:
  loadBalancer: {}
---
apiVersion: extensions/v1
kind: Deployment
metadata:
  name: test
spec:
  revisionHistoryLimit: 2
  strategy:
    type: RollingUpdate
  replicas: 1
  selector:
    matchLabels:
      test-app: test
  template:
    metadata:
      labels:
        test-app: test
    spec:
      volumes:
        - name: config-volume
          configMap:
            name: test-config
      containers:
        - name: configmap-reload
          image: "jimmidyson/configmap-reload:v0.1"
          imagePullPolicy: "IfNotPresent"
          args:
            - --volume-dir=/etc/config
            - --webhook-url=http://localhost:3000/-/reload
          volumeMounts:
            - name: config-volume
              mountPath: /etc/config
              readOnly: true
        - name: test
          image: reyhan/docker-try-config:1.0.3
          command: ["npm", "start"]
          imagePullPolicy: Never
          livenessProbe:
            httpGet:
              path: /info
              port: 3000
            initialDelaySeconds: 90
            periodSeconds: 5
          readinessProbe:
            httpGet:
              path: /info
              port: 3000
            initialDelaySeconds: 5
            periodSeconds: 5
          ports:
            - containerPort: 3000
          volumeMounts:
            - name: config-volume
              mountPath: /etc/config
          resources:
            requests:
              memory: "256Mi"
              cpu: "64m"
            limits:
              memory: "512Mi"
              cpu: "256m"
          env:
            - name: ENV_SQL_CLIENT
              value: "mysql"
            - name: ENV_SQL_HOST
              value: "13.67.44.182"
            - name: ENV_IS_MAINTENANCE
              valueFrom:
                configMapKeyRef:
                  name: test-config
                  key: ENV_IS_MAINTENANCE
            - name: ENV_IS_BLOWN_UP
              valueFrom:
                configMapKeyRef:
                  name: test-config
                  key: ENV_IS_BLOWN_UP