my-deployment-configmap.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-deployment
  namespace: my-namespace
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: my-app-container
        image: my-app-image:latest
        ports:
        - containerPort: 8080
        volumeMounts:
        - name: config-volume
          mountPath: /app/config
      volumes:
      - name: config-volume
        configMap:
          name: my-deployment-config