Fix image and improve content

Author: Andrea Scuderi

README.md

@@ -4,6 +4,10 @@ Setting up a consistent, cross-platform Swift development environment can be tri
 
 You'll get a fully functional Swift environment that runs inside Docker, complete with debugging, code completion, and a local AWS cloud stack for all your testing needs. Best of all? It works identically on macOS, Linux, and Windows.
 
+LocalStack is a fully functional local AWS cloud stack that allows you to test your cloud applications locally without connecting to the real AWS cloud. It provides a set of APIs that mimic the behavior of AWS services, making it easy to develop and test your applications in a safe and controlled environment.
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+![The Ultimate Swift Dev Environment](/images/swift-vscode-dev-continer-localstack.png)
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 ## Prerequisites
@@ -14,7 +18,8 @@ Before we start, make sure you have these tools installed on your system:
   * [Visual Studio Code](https://code.visualstudio.com/download)
   * [Visual Studio Code Remote - Containers Extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers)
   * [Docker Compose V2](https://docs.docker.com/compose/cli-command/)
-  * It's also helpful to review the [official guide on configuring VS Code for Swift](https://www.swift.org/documentation/articles/getting-started-with-vscode-swift.html).
+  * It's also helpful to review the [official guide on configuring VS Code for Swift](https://www.swift.org/documentation/articles/getting-started-with-vscode-swift.html) and install Swift extension.
+
 
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