In the Dockerfile, a new command has been added to install git. This allows for more flexibility in managing code versions within the container. In addition, a new endpoint '/version' has been introduced in index.php which returns JSON data about the last commit, its timestamp and the current branch. This provides an easy way to check versioning information directly from the application.
The code changes include an update to the response handling in index.php. Now, it checks if the request URI is '/metrics'. If so, it continues with the previous behavior of executing a script and outputting its result. If not, it loads a new 404 error page using Twig templating engine.
A new file '404.twig' has been added under templates directory which serves as a custom 404 error page. It displays the requested URI and provides a link back to '/metrics'.
