message: Add docs for tagging the debug stack
diff: @@ -137,3 +137,34 @@ If you have resources like RDS instances deployed inside a VPC, by default your
  3. And, finally install [Tunnelblick](https://tunnelblick.net) locally to establish the VPN connection.
  Note that, the AWS Client VPC service is billed on an hourly basis but it's fairly inexpensive. More details on the pricing here - https://aws.amazon.com/vpn/pricing/
  +
  +## Tagging the debug stack
  +
  +You can tag the debug stack by add a `debugStack` method to your `lib/index.js`.
  +
  +```js title="lib/index.js" {7-9}
  +import * as cdk from "@aws-cdk/core";
  +
  +export default function main(app) {
  + // define your stacks here
  +}
  +
  +export function debugStack(app, stack, props) {
  + cdk.Tags.of(app).add("my-stage", props.stage);
  +}
  +```
  +
  +Alternatively, if you are using TypeScript, add to your `lib/index.ts`.
  +
  +```ts title="lib/index.ts" {8-10}
  +import * as cdk from "@aws-cdk/core";
  +import * as sst from "@serverless-stack/resources";
  +
  +export default function main(app: sst.App): void {
  + // define your stacks here
  +}
  +
  +export function debugStack(app: cdk.App, stack: cdk.Stack, props: sst.DebugStackProps): void {
  + cdk.Tags.of(app).add("my-stage", props.stage);
  +}
  +```
  