当用户创建ECI Pod时，支持用户自定义容器的环境变量，通过容器的env字段指定环境变量，配置参考如下：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: registry-huadong1.crs-internal.ctyun.cn/open-source/nginx:1.25-alpine
        ports:
        - containerPort: 80
        env: 
          - name: ENV_TEST
            value: "test"
      nodeName: vnd-u53cymkxxxx-cn-huadong1-jsnj1a-public-ctcloud