如何用Visual Studio Code远程调试运行在服务器上的nodejs应用

假设我有一个nodejs应用，运行在AWS - 亚马逊云平台上(Amazone Web Service)。我想用本地的Visual Studio Code来远程调试服务器端的nodejs应用。

Visual Studio Code的调试配置里定义了两种类型，attach和launch。Visual Studio Code的官方文档对这两种调试启动行为的解释：

The best way to explain the difference between launch and attach is think of a launch configuration as a recipe for how to start your app in debug mode before VS Code attaches to it,

Launch的意思简而言之就是以debug模式启动app。

while an attachconfiguration is a recipe for how to connect VS Code's debugger to an app or process that's alreadyrunning.

而Attach的含义是将Visual Studio Code的调试器绑定到一个已经处于运行状态的应用。

因为我的需求是用本地的Visual Studio Code去调试AWS上正在运行的nodejs应用，毫无疑问应该选Attach。
点击debug configuration这个按钮：

自动弹出存放调试配置信息的launch.json文件了：

把launch.json的内容替换成下面的内容：

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        
        {
            "type": "node",
            "request": "attach",
            "name": "Jerry's first debug config",
            "address": "127.0.0.1",
            "port": 9221
        }
    ]
}