Added localstack example using docker compose

[ulises-jeremias]

This PR adds an example using LocalStack to run cloud services locally with Docker Compose. This example shows how to use LocalStack to emulate AWS services locally using docker compose.

Project structure:

.
├── init.d/
│   └── init.sh
├── compose.yaml
└── README.md

compose.yaml

services:
  localstack:
    image: localstack/localstack:2.3.2
    ports:
      - "4566:4566" # LocalStack Gateway
      - "4510-4559:4510-4559" # external services port range
    ...