---
apiVersion: apps/v1
kind: Deployment
spec:
  selector:
    matchLabels:
      app.kubernetes.io/name: app
  template:
    metadata:
      labels:
        app.kubernetes.io/name: app
    spec:
      containers:
      - env:
        - name: tmpdir
          value: /tmp
        image: my/app:1.0.0
        securityContext:
          readOnlyRootFilesystem: true
        volumeMounts:
        - mountPath: /tmp
      volumes:
      - emptyDir: {}