Merge pull request #40979 from asa3311/sync-deployment.md

[zh-cn] sync deployment.md

Author: k8s-ci-robot

content/zh-cn/docs/concepts/workloads/controllers/deployment.md

@@ -84,10 +84,17 @@ The following are typical use cases for Deployments:
 <!--
 ## Creating a Deployment
 
+Before creating a Deployment define an 
+[environment variable](/docs/tasks/inject-data-application/define-environment-variable-container/#define-an-environment-variable-for-a-container)
+for a container.
+
 The following is an example of a Deployment. It creates a ReplicaSet to bring up three `nginx` Pods:
 -->
 ## 创建 Deployment  {#creating-a-deployment}
 
+在创建 Deployment 之前，请为容器定义一个
+[环境变量](/zh-cn/docs/tasks/inject-data-application/define-environment-variable-container/#define-an-environment-variable-for-a-container)。
+
 下面是一个 Deployment 示例。其中创建了一个 ReplicaSet，负责启动三个 `nginx` Pod：
 
 {{< codenew file="controllers/nginx-deployment.yaml" >}}