deployment.yaml

kind: Deployment
apiVersion: apps/v1
metadata:
  name: app
spec:
  selector:
    matchLabels:
      app: app
  replicas: 3
  template:
    metadata:
      labels:
        app: app
    spec:
      containers:
        - name: app
          image: app
          imagePullPolicy: Never # You should build your _app_ local Docker image before you apply this Kubernetes YAML to Kubernetes on Docker Desktop on your laptop—see https://github.com/kubernetes/api/blob/bad7d34a01c9f8a0d49727440da0f8f3d68d84bd/core/v1/types.go#L2502-L2508.
          envFrom:
            - configMapRef:
                name: app
            - secretRef:
                name: app