Restart pod when another service is recreated

Question

I have a flask pod that connects to a mongodb service through the environment variable SERVICE_HOST (DNS discovery didn't work for some reason), when I change something in mongodb service and re-apply it, the flask pod won't be able to connect to the service anymore since the service host changes, I have to recreate it everytime manually, is there a way to automate this, sort of like docker-compose depends_on directive ?

flask yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: proxy23-api-deployment
  labels:
    app: proxy23-api
spec:
  replicas: 2
  selector:
    matchLabels:
      app: proxy23-api
  template:
    metadata:
      labels:
        app: proxy23-api
    spec:
      containers:
        - name: proxy23-api
          image: my_image
          ports:
            - containerPort: 5000
          env:
            - name: DB_URI
              value: mongodb://$(PROXY23_DB_SERVICE_SERVICE_HOST):27017
            - name: DB_NAME
              value: db
            - name: PORT
              value: "5000"
      imagePullSecrets:
        - name: registry-credentials
---
apiVersion: v1
kind: Service
metadata:
  name: proxy23-api-service
spec:
  selector:
    app: proxy23-api
  type: NodePort
  ports:
    - port: 9002
      targetPort: 5000
      nodePort: 30002

mongodb yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: proxy23-db-deployment
  labels:
    app: proxy23-db
spec:
  replicas: 1
  selector:
    matchLabels:
      app: proxy23-db
  template:
    metadata:
      labels:
        app: proxy23-db
    spec:
      containers:
        - name: proxy23-db
          image: mongo:bionic
          ports:
            - containerPort: 27017
          volumeMounts:
            - name: proxy23-storage
              mountPath: /data/db
      volumes:
        - name: proxy23-storage
          persistentVolumeClaim:
            claimName: proxy23-db-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: proxy23-db-service
spec:
  selector:
    app: proxy23-db
  type: NodePort
  ports:
    - port: 27017
      targetPort: 27017
      nodePort: 30003