nginx-deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  annotations:
    reloader.stakater.com/auto: "true"
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80
        env:
        - name: SECRET_DEMO
          valueFrom:
            secretKeyRef:
              name: secret-demo
              key: secret-demo
        command:
        - "/bin/bash"
        - "-c"
        - |
          echo "$SECRET_DEMO" > /usr/share/nginx/html/index.html
          nginx -g 'daemon off;'