Update README.md with badges and markdown formatting

Removed old HTML structure and added badges for GitHub actions, source, authors, Docker pulls, and license.

Author: edoardocavazza

README.md

@@ -1,22 +1,10 @@
-<p align="center">
-    <a href="https://www.chialab.io/p/docker-php">
-        <img alt="Docker PHP Images logo" width="144" height="144" src="https://raw.githack.com/chialab/docker-php/master/logo.svg" />
-    </a>
-</p>
-
-<p align="center">
-  <strong>Docker PHP images</strong>
-</p>
-
-<p align="center">
-    <a href="https://github.com/chialab/docker-php/actions"><img alt="GitHub Workflow Status" src="https://img.shields.io/github/actions/workflow/status/chialab/docker-php/main.yml?branch=main&style=flat-square"></a>
-    <a href="https://github.com/chialab/docker-php"><img alt="Source link" src="https://img.shields.io/badge/Source-GitHub-lightgrey.svg?style=flat-square"></a>
-    <a href="https://www.chialab.it"><img alt="Authors link" src="https://img.shields.io/badge/Authors-Chialab-lightgrey.svg?style=flat-square"></a>
-    <a href="https://hub.docker.com/r/chialab/php/"><img alt="Docker Pulls" src="https://img.shields.io/docker/pulls/chialab/php.svg?style=flat-square"></a>
-    <a href="https://github.com/chialab/docker-php/blob/master/LICENSE"><img alt="License" src="https://img.shields.io/github/license/chialab/docker-php.svg?style=flat-square"></a>
-</p>
+# Docker PHP images
 
----
+[![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/chialab/docker-php/main.yml?branch=main&style=flat-square)](https://github.com/chialab/docker-php/actions)
+[![Source link](https://img.shields.io/badge/Source-GitHub-lightgrey.svg?style=flat-square)](https://github.com/chialab/docker-php)
+[![Authors link](https://img.shields.io/badge/Authors-Chialab-lightgrey.svg?style=flat-square)](https://www.chialab.it)
+[![Docker Pulls](https://img.shields.io/docker/pulls/chialab/php.svg?style=flat-square)](https://hub.docker.com/r/chialab/php/)
+[![License](https://img.shields.io/github/license/chialab/docker-php.svg?style=flat-square)](https://github.com/chialab/docker-php/blob/master/LICENSE)
 
 Docker images built on top of the [official PHP images](https://hub.docker.com/r/_/php/) with the addition of some common and useful extensions, installed with [mlocati/docker-php-extension-installer](https://github.com/mlocati/docker-php-extension-installer). You can find these images on the [Docker Hub](https://hub.docker.com/r/chialab/php/) (and if you're reading this file, you're probably already there).