message: Add example for setting permission boundary
diff: @@ -214,6 +214,32 @@ this.account;
  The region here is the same as the one you can find in the `scope` instance in the constructor.
  +### Setting Permission Boundary
  +
  +To set permission boundary on all IAM users and roles created in your `Stack` instances.
  +
  +```js
  +import * as iam from '@aws-cdk/aws-iam';
  +
  +class MyStack extends sst.Stack {
  + constructor(scope, id, props) {
  + super(scope, id, props);
  +
  + const boundary = new iam.ManagedPolicy(this, "Boundary", {
  + statements: [
  + new iam.PolicyStatement({
  + effect: iam.Effect.DENY,
  + actions: ["iam:*"],
  + resources: ["*"],
  + }),
  + ],
  + });
  +
  + iam.PermissionsBoundary.of(this).apply(boundary);
  + }
  +}
  +```
  +
  ## Methods
  An instance of `Stack` contains the following methods.
  