Add information about Docker usage

Author: Wirone

index.rst

@@ -39,6 +39,22 @@ the ``tools/php-cs-fixer`` directory:
 
 For more details and other installation methods, see `installation instructions <./doc/installation.rst>`__.
 
+Run with Docker
+~~~~~~~~~~~~~~~
+
+PHP CS Fixer can be run in a Docker container.
+
+You can use pre-built Docker images to run ``php-cs-fixer``.
+
+.. code:: console
+    docker run -v $(pwd):/code ghcr.io/php-cs-fixer/php-cs-fixer:${FIXER_VERSION:-3-php8.3} fix src
+
+``$FIXER_VERSION`` used in example above is an identifier of a release you want to use, which is based on Fixer and PHP versions combined. There are different tags for each Fixer's SemVer level and PHP version with syntax ``<php-cs-fixer-version>-php<php-version>``. For example:
+
+* ``3.47.0-php7.4``
+* ``3.47-php8.0``
+* ``3-php8.3``
+
 Usage
 ~~~~~