How to debug this project?

How do you perform debugging with `backpack` ?
I'm using VS Code.

For Node.js program, by default the config would be like:
```
{
"type": "node",
"request": "launch",
"name": "Launch Program",
"skipFiles": [
"/**"
],
"program": "${workspaceFolder}/build/main.js"
}
```
How to adjust this?
And maybe should also put this in the docs?

Start with the Node.js entry point `build/main.js` and the VS Code launch configuration shown in the issue. Determine how Backpack’s build output should be launched under the debugger, then verify the configuration with a debugging session. Done means the working setup is documented clearly for VS Code users.

Written by the indexing model from the issue text.