use localstack image version with fix for requests not being forward …

…to backend when using the recommended /_aws/execute-api endpoint

terraform-localstack/README.md

@@ -5,7 +5,7 @@ In local development, we use localstack to emulate API Gateway functionality of
 1 - Run localstack locally.
 
 ```bash
-docker run --rm -it -p 4566:4566 localstack/localstack
+docker run --rm -it -p 4566:4566 localstack/localstack:4.0.3
 ```
 
 2 - Terraform apply the content of this folder and confirm the changes in the prompt (use terraform version `v1.3.6`). This will output an `access_url` of the form `http://host.docker.internal:4566/restapis/{gateway_id}/prod/_user_request_`. If you choose to use a different port in Step 1, update the access_url variable in outputs.tf to reflect the chosen port..