docs: add Lambda Layer SAR App url and ARN

Signed-off-by: heitorlessa <[email protected]>

Author: heitorlessa

docs/content/index.mdx

@@ -20,10 +20,30 @@ Powertools is available in PyPi. You can use your favourite dependency managemen
 * [pip](https://pip.pypa.io/en/latest/index.html): `pip install aws-lambda-powertools`
 
 **Quick hello world example using SAM CLI**
+
 ```bash:title=hello_world.sh
 sam init --location https://github.com/aws-samples/cookiecutter-aws-sam-python
 ```
 
+### Lambda Layer
+
+Powertools is also available as a Lambda Layer. It is distributed via the [AWS Serverless Application Repository (SAR)](https://docs.aws.amazon.com/serverlessrepo/latest/devguide/what-is-serverlessrepo.html).
+
+App | ARN
+----------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------
+[aws-lambda-powertools-python-layer](https://serverlessrepo.aws.amazon.com/applications/eu-west-1/057560766410/aws-lambda-powertools-python-layer) | arn:aws:serverlessrepo:eu-west-1:057560766410:applications/aws-lambda-powertools-python-layer
+
+If using SAM, you can include this SAR App as part of your shared Layers stack, and lock to a specific semantic version. Once deployed, it'll be available across the account this is deployed to.
+
+```yaml
+  AwsLambdaPowertoolsPythonLayer:
+    Type: AWS::Serverless::Application
+    Properties:
+      Location:
+        ApplicationId: arn:aws:serverlessrepo:eu-west-1:057560766410:applications/aws-lambda-powertools-python-layer
+        SemanticVersion: 1.3.1 # change to latest semantic version available in SAR
+```
+
 ## Features
 
 Utility | Description
@@ -58,22 +78,6 @@ from aws_lambda_powertools.logging.logger import set_package_logger
 set_package_logger()
 ```
 
-## Lambda Layer
-
-Powertools is also available as a layer and is distributed via the [Serverless Application Repository](https://docs.aws.amazon.com/serverlessrepo/latest/devguide/what-is-serverlessrepo.html).
-Create the layer via API with:
-
-```bash:title=bash-script
-aws serverlessrepo create-cloud-formation-change-set --application-id arn:aws:serverlessrepo:eu-west-1:057560766410:applications/aws-lambda-powertools-python-layer --stack-name YOUR_STACK_NAME --capabilities CAPABILITY_NAMED_IAM
-CHANGE_SET_ID=$(aws cloudformation list-change-sets --stack-name YOUR_STACK_NAME --query 'Summaries[*].ChangeSetId' --output text)
-aws cloudformation wait change-set-create-complete --change-set-name $CHANGE_SET_ID
-aws cloudformation execute-change-set --change-set-name $CHANGE_SET_ID
-```
-
-this will create a CloudFormation stack with the powertools layer in a specific region where you run this commands.
-Keep in mind that layers are regional resources and you need to create the layer in every region where you need it.
-Alternatively, you can deploy the layer from the AWS Console by navigating to Serverless Application Repository and search for `aws-lambda-powertools-python-layer` and follow the deploy steps from there.
-
 ## Tenets
 
 * **AWS Lambda only** – We optimise for AWS Lambda function environments and supported runtimes only. Utilities might work with web frameworks and non-Lambda environments, though they are not officially supported.